Gordon Natural Area

Common Name: Crustose, Corticolous Lichen

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2020-2021

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

71301639 (Observed: 3/12/2020)

Common Name: No Common Name

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2020-2021

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

70038023 (Observed: 8/17/2020)

Common Name: Shadow Dot Lichen

Type: Crustose

Substrate(s): Every Available Substrate

Year Noted: 2020-2021

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

336613895 (Observed: 3/15/2019)

103099461 (Observed: 4/9/2020)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 443).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 222).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 291).

Common Name: Button Lichens

Type: Crustose

Substrate(s): Saxicolous

Year Noted: 2021

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

88175930 (Observed: 7/22/2021)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 186).

Common Name: Pyxine Lichens

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2019

Identified By: C.J. Pasiche Lisboa (iNaturalist)

First Noted By: Nur Ritter

iNaturalist Observations:

70586979 (Observed: 12/2/2019)

Common Names: Powdery Gold Speck Lichen; Yellow Powder

Type: Crustose

Substrate(s): Corticolous

Years Noted: 2019; 2021-2026

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

102183172 (Observed: 11/29/2021)

36750841 (Observed: 12/18/2019)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 54).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 207).

Brodo, I. M. and B. Craig (2004). Identifying Mixed Hardwood Forest Lichens, A Reference Notebook. Canadian Museum of Nature, Ottawa, Canada (p. 3).

Frantz, M. W., et al. (2018). Lichens of West Virginia: Ecological Indicators of Habitat Types. Morgantown, WV., West Virginia University (p. 49).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 6).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 13).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 113).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 94).

Common Names: Common Goldspeck Lichen; Common Yolk Lichen

Synonyms: Candelaria vitellina

Type: Crustose

Substrate(s): Saxicolous

Year Noted: 2021-2025

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

200652592 (Observed: 2/27/2024)

149431444 (Observed: 2/22/2023)

70341304 (Observed: 2/28/2021)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 56).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 208).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 6).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 14).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 60).

Common Name: Frosted Comma Lichen

Synonyms: Arthonia caesia

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2020-2026

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

333757037 (Observed: 1/6/2026)

264115733 (Observed: 3/6/2025)

158608984 (Observed: 4/26/2023)

107767333 (Observed: 3/1/2022)

40237917 (Observed: 3/18/2020)

103099069 (Observed: 12/14/2021)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 44).

Bennett, J. P. (2017). Common Lichens of Wisconsin. Madison, WI, Wisconsin State Herbarium: 18 (p. 3).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 70).

Common Name: Nipple Lichen

Type: Fruticose

Substrate(s): Terricolous

Year Noted: 2019

Identified By: Nur Ritter

First Noted By: Maribeth Beatty

Comments:
Thus far, a single occurrence noted at the Gordon.

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 610).

Frantz, M. W., et al. (2018). Lichens of West Virginia: Ecological Indicators of Habitat Types. Morgantown, WV., West Virginia University (p. 58).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 161).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 45).

Common Names: Pink Dimple Lichen; Lesser Candydish

Type: Crustose

Substrate(s): Bryophilous & Corticolous

Year Noted: 2022

Identified By: J. Jensen (FB Lichen Identification Group)

First Noted By: Nur Ritter

iNaturalist Observations:

107413917 (Observed: 2/21/2022)

Literature:

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 101*).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 154).

Note: An asterisk after a page number signifies that the species is only mentioned on that page.

Common Name: Common Script Lichen

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2020-2024

Identified and First Noted By: Nur Ritter

Comments:
To date, a single 'occurrence' noted: growing on a large, fallen Northern Red Oak (Quercus rubra).

iNaturalist Observations:

70250519 (Observed: 2/26/2021)

46418403 (Observed: 5/18/2020)

Literature:

Bennett, J. P. (2017). Common Lichens of Wisconsin. Madison, WI, Wisconsin State Herbarium: 18 (p. 3).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 327).

Brodo, I. M. and B. Craig (2004). Identifying Mixed Hardwood Forest Lichens, A Reference Notebook. Canadian Museum of Nature, Ottawa, Canada (p. 6).

Frantz, M. W., et al. (2018). Lichens of West Virginia: Ecological Indicators of Habitat Types. Morgantown, WV., West Virginia University (p. 48).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 27).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 94).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 15).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 15).

Common Name: Burnt Lips

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2024

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

261645465 (Observed: 11/11/2024)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 536).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 95*).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 352).

Note: An asterisk after a page number signifies that the species is only mentioned on that page.

Common Name: Barnacle Lichens

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2022

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

108599099 (Observed: 3/14/2022)

Common Names: Fringed Stud Lichen; Mapledust Lichen

Type: Crustose

Substrate(s): Corticolous

Years Noted: 2020-2021; 2025

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

322760411 (Observed: 10/23/2025)

50918726 (Observed: 6/25/2020)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 389).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 174).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 31).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 86).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 244-245).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 97).

Common Names: Beaded Rim-lichen; Ashen Stud Lichen

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2021

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

103433320 (Observed: 12/21/2021)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 377-378).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 166).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 31).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 229-230).

Common Names: Bumpy-rim Lichen; Under-fruited Lichen

Type: Crustose

Substrate(s): Corticolous

Years Noted: 2019; 2021-2023

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

148691962 (Observed: 2/1/2023)

107768176 (Observed: 3/1/2022)

70262335 (Observed: 2/26/2021)

69525803 (Observed: 12/6/2019)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 381).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 168).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 31).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 16).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 233).

Common Name: Rim Lichen

Type: Crustose

Substrate(s): Saxicolous

Year Noted: 2020-2021

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

52529110 (Observed: 7/9/2020)

Common Name: Mealy Rim-lichen

Type: Crustose

Substrate(s): Corticolous

Years Noted: 2019; 2021; 2023-2024

Identified By: C.J. Pasiche Lisboa (iNaturalist)

First Noted By: Nur Ritter

iNaturalist Observations:

254715809 (Observed: 12/9/2024)

198233079 (Observed: 2/2/2024)

148711612 (Observed: 2/13/2023)

102871224 (Observed: 12/7/2021)

70354737 (Observed: 2/28/2021)

70256135 (Observed: 2/26/2021)

36346268 (Observed: 12/2/2019)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 58).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 388).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 172).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 18).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 242-243).

Common Name: Rim-lichen

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2020-2021

Identified and First Noted By: Nur Ritter

Comments:
At this point, only a single occurrence noted. Growing on a small, fallen branch.

iNaturalist Observations:

39553669 (Observed: 3/4/2020)

Common Name: Bark Disc Lichen

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2020-2021

Identified and First Noted By: Nur Ritter

Comments:
At this point, only a single occurrence noted. Growing on a small, fallen branch.

iNaturalist Observations:

39553361 (Observed: 3/4/2020)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 394).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 98).

Common Name: Hagen's Rim-lichen

Synonyms: Lecanora hagenii; Myriolecis hagenii

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2021

Identified and First Noted By: Nur Ritter

Common Name: Variable Brown Dotlets

Synonyms: Traponora varians

Type: Crustose

Substrate(s): Corticolous & Lignicolous

Years Noted: 2021; 2024-2025

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

70257146 (Observed: 2/26/2021)

262284807 (Observed: 2/18/2025)

254720230 (Observed: 12/10/2024)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 47).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 614*; 615*).

Klips, R. (2022). Common Mosses, Liverworts, and Lichens of Ohio. Columbus, OH, Ohio University Press (p. NA!).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 176; 367).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 396).

Note: An asterisk after a page number signifies that the species is only mentioned on that page.

Common Name: Smokey-eye Boulder Lichen

Type: Crustose

Substrate(s): Saxicolous

Year Noted: 2019-2026

Identified By: C.J. Pasiche Lisboa (iNaturalist)

First Noted By: Nur Ritter

Comments:
The most frequently encountered and abundant saxicolous lichen (i.e. one that grows on rock) in the Gordon. Habitat: on boulders and rocks (as would be expected) throughout the Gordon.

iNaturalist Observations:

146847074 (Observed: 1/18/2023)

106389699 (Observed: 2/8/2022)

93391724 (Observed: 9/2/2021)

73239597 (Observed: 4/6/2021)

77680081 (Observed: 5/6/2021)

70630511 (Observed: 3/3/2021)

70630029 (Observed: 3/3/2021)

70254484 (Observed: 2/26/2021)

67721320 (Observed: 1/7/2021)

41029030 (Observed: 3/29/2020)

37884642 (Observed: 2/15/2019)

37885224 (Observed: 11/5/2019)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 35).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 583).

Frantz, M. W., et al. (2018). Lichens of West Virginia: Ecological Indicators of Habitat Types. Morgantown, WV., West Virginia University (p. 13).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 43).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 24).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 20).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 377).

Common Names: Cinder Lichen; Ashen Stud Lichens

Type: Crustose

Substrate(s): Saxicolous

Year Noted: 2019

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

38905196 (Observed: 11/4/2019)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 168).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 2).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 156).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 77).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 57).

Common Name: Sunken Disk Lichen

Type: Crustose

Substrate(s): Saxicolous

Year Noted: 2020-2021

Identified By: C.J. Pasiche Lisboa (iNaturalist)

First Noted By: Nur Ritter

iNaturalist Observations:

40239121 (Observed: 3/18/2020)

Common Name: Sunken Disk Lichen

Type: Crustose

Substrate(s): Saxicolous

Year Noted: 2020-2021

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

70413658 (Observed: 3/18/2020)

Common Name: Crabseye Lichens

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2022

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

144685332 (Observed: 12/19/2022)

Common Name: Scribble Lichen

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2021-2025

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

85396679 (Observed: 7/2/2021)

Common Name: Pustule Crust Lichen

Synonyms: Haematomma pustulatum

Type: Crustose

Substrate(s): Corticolous & Lignicolous (Rarely)

Year Noted: 2020-2021

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

69467088 (Observed: 5/21/2020)

70812280 (Observed: 2/28/2021)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 426-S).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 258).

Common Name: Pore Lichens

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2020-2021

Identified and First Noted By: Nur Ritter

Comments:
Growing on the trunk of a Northern Red Oak (Quercus rubra).

iNaturalist Observations:

38904682 (Observed: 1/14/2020)

Common Names: Little Knob Lichen; Branch Bumps

Type: Crustose

Substrate(s): Corticolous

Years Noted: 2021; 2024

Identified By: Nur Ritter

First Noted By: Mackenzie Rose

Also Noted By: Nur Ritter

iNaturalist Observations:

70354431 (Observed: 2/28/2021)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 59).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 526*; 535*).

Klips, R. (2022). Common Mosses, Liverworts, and Lichens of Ohio. Columbus, OH, Ohio University Press (p. 348).

Lendemer, J. C. (2013). A monograph of the crustose members of the genus Lepraria Ach. s. str. (Stereocaulaceae, Lichenized Ascomycetes) in North America north of Mexico. Opuscula Philolichenum 11: 27-141 (p. 306).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 40).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 347).

Note: An asterisk after a page number signifies that the species is only mentioned on that page.

Common Name: Whitewash Lichen

Type: Crustose

Substrate(s): Corticolous

Years Noted: 2020-2021; 2023

Identified and First Noted By: Nur Ritter

Comments:
A tentative ID.

iNaturalist Observations:

52529558 (Observed: 7/9/2020)

146765167 (Observed: 1/11/2023)

70629317 (Observed: 3/3/2021)

70614418 (Observed: 3/3/2021)

70111098 (Observed: 2/24/2021)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 545).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 103).

Common Name: Bark Whitewash

Type: Crustose

Substrate(s): Corticolous & Saxicolous (Occasionally)

Year Noted: 2021

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

103061993 (Observed: 12/14/2021)

Literature:

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 286).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 357).

Common Name: Pepper-Spore Lichens

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2024

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

254723489 (Observed: 12/9/2024)

Literature:

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 124-G).

Common Name: Dot Lichen

Type: Crustose

Substrate(s): Saxicolous

Year Noted: 2020-2021

Identified and First Noted By: Nur Ritter

Comments:
To date, just a single occurrence has been noted at the Gordon; however, this species is quite difficult to detect. Growing on a small rock with scattered bryophytes.

iNaturalist Observations:

38797353 (Observed: 2/18/2020)

Common Name: Dusty Comets

Type: Crustose

Substrate(s): Corticolous

Year Noted: 2021

Identified By: Tom Walker (iNaturalist)

First Noted By: Nur Ritter

iNaturalist Observations:

70351897 (Observed: 2/28/2021)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 124*; 649*).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 420).

Note: An asterisk after a page number signifies that the species is only mentioned on that page.

Common Name: Dust Lichen

Type: Leprose-Crustose

Substrate(s): Saxicolous

Year Noted: 2019

Identified By: G. Perlmutter (iNaturalist)

First Noted By: Nur Ritter

Comments:
Thus far, only noted once in the Gordon. Growing in secondary forest on a small boulder.

iNaturalist Observations:

38835697 (Observed: 10/29/2019)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 397).

Lendemer, J. C. (2013). A monograph of the crustose members of the genus Lepraria Ach. s. str. (Stereocaulaceae, Lichenized Ascomycetes) in North America north of Mexico. Opuscula Philolichenum 11: 27-141 (p. 97).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 18).

Common Name: Pin-cushion Sunburst Lichen

Type: Crustose

Substrate(s): Corticolous, Lignicolous, & Saxicolous

Year Noted: 2021

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

103161885 (Observed: 12/15/2021)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 746).

Common Names: Jack-o-Lantern Lichen; Mustard Lichen

Type: Foliose

Substrate(s): Corticolous

Year Noted: 2021-2026

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

262432917 (Observed: 2/20/2025)

251702301 (Observed: 11/14/2024)

148894201 (Observed: 2/15/2023)

148758302 (Observed: 2/13/2023)

106746545 (Observed: 2/11/2022)

104415291 (Observed: 1/4/2022)

102871583 (Observed: 12/7/2021)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 74).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 617*).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 111).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 53*).

Note: An asterisk after a page number signifies that the species is only mentioned on that page.

Common Names: Lemon Lichen; Candle Flame Lichen

Type: Foliose-Squamulose

Substrate(s): Corticolous & Saxicolous

Year Noted: 2018-2026

Identified and First Noted By: Nur Ritter

Comments:
Seemingly, one of the most common lichens at the Gordon.

iNaturalist Observations:

104343979 (Observed: 9/11/2020)

95680014 (Observed: 9/21/2021)

70617842 (Observed: 3/3/2021)

40238602 (Observed: 3/18/2020)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 90).

Bennett, J. P. (2017). Common Lichens of Wisconsin. Madison, WI, Wisconsin State Herbarium: 18 (p. 5).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 205).

Brodo, I. M. and B. Craig (2004). Identifying Mixed Hardwood Forest Lichens, A Reference Notebook. Canadian Museum of Nature, Ottawa, Canada (p. 2).

Frantz, M. W., et al. (2018). Lichens of West Virginia: Ecological Indicators of Habitat Types. Morgantown, WV., West Virginia University (p. 29).

Hale, M. E. (1979). How To Know The Lichens. Dubuque, IA, W.C. Brown Company Publishers (p. 35).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 140).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 99).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 5).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 44).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 29).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 24).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 111).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 105).

Common Name: Texas Shield Lichen

Type: Foliose

Year Noted: 2025

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

263419159 (Observed: 2/28/2025)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 212).

Klips, R. (2022). Common Mosses, Liverworts, and Lichens of Ohio. Columbus, OH, Ohio University Press (p. 301*).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 181).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 115).

Note: An asterisk after a page number signifies that the species is only mentioned on that page.

Common Names: Common Greenshield Lichen; Wrinkled Shield Lichen

Type: Foliose

Substrate(s): Every Available Substrate

Years Noted: 2018-2019; 2021; 2023-2026

Identified and First Noted By: Nur Ritter

Comments:
Common at the Gordon.

iNaturalist Observations:

325029728 (Observed: 11/4/2025)

254721817 (Observed: 12/9/2024)

70146709 (Observed: 1/8/2021)

70084512 (Observed: 10/29/2019)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 93).

Bennett, J. P. (2017). Common Lichens of Wisconsin. Madison, WI, Wisconsin State Herbarium: 18 (p. 5).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 317).

Brodo, I. M. and B. Craig (2004). Identifying Mixed Hardwood Forest Lichens, A Reference Notebook. Canadian Museum of Nature, Ottawa, Canada (p. 5).

Frantz, M. W., et al. (2018). Lichens of West Virginia: Ecological Indicators of Habitat Types. Morgantown, WV., West Virginia University (p. 24).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 250).

Klips, R. (2022). Common Mosses, Liverworts, and Lichens of Ohio. Columbus, OH, Ohio University Press (p. 263).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 183).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 25).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 42).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 33).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 28).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 176).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 107).

Common Names: Lead Lichen; Wrinkled Loop Lichen; Clingy Square Britches

Type: Foliose

Substrate(s): Corticolous

Years Noted: 2021; 2025

Identified By: James Lendemer (iNaturalist)

First Noted By: Nur Ritter

iNaturalist Observations:

322759130 (Observed: 10/23/2025)

102723609 (Observed: 12/7/2021)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 358).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 278).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 186).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 29).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 31).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 2010).

Common Name: Abraded Camouflage Lichen

Synonyms: Melanelia subaurifera

Type: Foliose

Substrate(s): Corticolous, Lignicolous (Sometimes), and Saxicolous (Rarely)

Year Noted: 2025

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

262141840 (Observed: 2/11/2025)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 439).

Brodo, I. M. and B. Craig (2004). Identifying Mixed Hardwood Forest Lichens, A Reference Notebook. Canadian Museum of Nature, Ottawa, Canada (p. 8).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 319).

Klips, R. (2022). Common Mosses, Liverworts, and Lichens of Ohio. Columbus, OH, Ohio University Press (p. 273).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 54).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 35).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 112).

Common Name: Powdery Axil Bristle Lichen

Synonyms: Parmelia aurulenta

Type: Foliose

Year Noted: 2025

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

328242065 (Observed: 11/25/2025)

325023207 (Observed: 11/4/2025)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 66).

Bennett, J. P. (2017). Common Lichens of Wisconsin. Madison, WI, Wisconsin State Herbarium: 18 (p. 7).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 447).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 323).

Klips, R. (2022). Common Mosses, Liverworts, and Lichens of Ohio. Columbus, OH, Ohio University Press (p. 302).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 191).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 35).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 38).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 303).

Common Name: Smooth Axil-bristle Lichen

Type: Foliose

Substrate(s): Corticolous

Year Noted: 2024-2025

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

263393106 (Observed: 2/28/2025)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 447).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 324).

Klips, R. (2022). Common Mosses, Liverworts, and Lichens of Ohio. Columbus, OH, Ohio University Press (p. 290).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 192).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 39).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 303).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 115).

Common Names: Squarrose Shield Lichen; Bottlebrush Shield Lichen

Type: Foliose

Substrate(s): Corticolous & Saxicolous

Year Noted: 2019

Identified and First Noted By: Nur Ritter

Comments:
Seemingly, quite common at the Gordon.

Literature:

Bennett, J. P. (2017). Common Lichens of Wisconsin. Madison, WI, Wisconsin State Herbarium: 18 (p. 7).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 484).

Brodo, I. M. and B. Craig (2004). Identifying Mixed Hardwood Forest Lichens, A Reference Notebook. Canadian Museum of Nature, Ottawa, Canada (p. 9).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 339).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 192).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 36).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 17).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. *36).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 40*).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 116).

Note: An asterisk after a page number signifies that the species is only mentioned on that page.

Common Name: Shield Lichens and Allies

Type: Foliose

Substrate(s): Corticolous

Year Noted: 2019

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

104464002 (Observed: 10/25/2019)

Common Names: Powdered Ruffle Lichen; Bleached Shield Lichen

Type: Foliose

Substrate(s): Corticolous

Years Noted: 2019; 2022; 2025

Identified By: Tom Walker (iNaturalist)

First Noted By: Nur Ritter

Comments:
In part, can be differentiated from other species of Parmotrema in the area by the white lower margin of the thallus lobes (Orr 2011, p. 37).

iNaturalist Observations:

264015035 (Observed: 2/28/2025)

262164479 (Observed: 2/18/2025)

104466975 (Observed: 10/25/2019)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 68).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 496).

Frantz, M. W., et al. (2018). Lichens of West Virginia: Ecological Indicators of Habitat Types. Morgantown, WV., West Virginia University (p. 27).

Klips, R. (2022). Common Mosses, Liverworts, and Lichens of Ohio. Columbus, OH, Ohio University Press (p. 303).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 197).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 38).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 38).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 42).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 325).

Common Name: Ruffle Lichen

Type: Foliose

Substrate(s): Corticolous

Year Noted: 2019-2020

Identified By: Tom Walker (iNaturalist)

First Noted By: Nur Ritter

Also Noted By: Noah Long;

iNaturalist Observations:

39213459 (Observed: 10/21/2019)

Common Name: Ruffle Lichen

Type: Foliose

Substrate(s): Corticolous

Year Noted: 2021

Identified By: Nur Ritter

First Noted By: Noah Long

iNaturalist Observations:

38341405 (Observed: 2/2/2020)

Common Name: Reticulated Shield Lichen

Type: Foliose

Substrate(s): Corticolous & Saxicolous (Occasionally)

Year Noted: 2024-2025

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

329109368 (Observed: 12/1/2025)

255673201 (Observed: 12/19/2024)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 70).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 642).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 353).

Klips, R. (2022). Common Mosses, Liverworts, and Lichens of Ohio. Columbus, OH, Ohio University Press (p. 305).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 201).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 38).

Common Names: Powdered Speckled Shield Lichen; Moondust Speckled Lichen

Type: Foliose

Substrate(s): Corticolous

Year Noted: 2022

Identified By: Tom Walker (iNaturalist)

First Noted By: Nur Ritter

iNaturalist Observations:

105172200 (Observed: 1/18/2022)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 71).

Frantz, M. W., et al. (2018). Lichens of West Virginia: Ecological Indicators of Habitat Types. Morgantown, WV., West Virginia University (p. 32).

Klips, R. (2022). Common Mosses, Liverworts, and Lichens of Ohio. Columbus, OH, Ohio University Press (p. 306).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 206).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 52*).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 389).

Note: An asterisk after a page number signifies that the species is only mentioned on that page.

Common Name: Rough Shield Lichen

Type: Foliose

Substrate(s): Corticolous & Saxicolous

Years Noted: 2019; 2021-2024

Identified By: Tom Walker (iNaturalist)

First Noted By: Nur Ritter

iNaturalist Observations:

336608553 (Observed: 1/22/2026)

137737658 (Observed: 10/5/2022)

262292223 (Observed: 2/22/2019)

121766967 (Observed: 6/9/2022)

105981383 (Observed: 2/1/2022)

104409470 (Observed: 1/4/2022)

70841702 (Observed: 3/8/2021)

70611707 (Observed: 3/3/2021)

70084853 (Observed: 7/8/2019)

70055212 (Observed: 11/26/2019)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 72).

Bennett, J. P. (2017). Common Lichens of Wisconsin. Madison, WI, Wisconsin State Herbarium: 18 (p. 12).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 608).

Brodo, I. M. and B. Craig (2004). Identifying Mixed Hardwood Forest Lichens, A Reference Notebook. Canadian Museum of Nature, Ottawa, Canada (p. 19).

Frantz, M. W., et al. (2018). Lichens of West Virginia: Ecological Indicators of Habitat Types. Morgantown, WV., West Virginia University (p. 33).

Klips, R. (2022). Common Mosses, Liverworts, and Lichens of Ohio. Columbus, OH, Ohio University Press (p. 308).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 208).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 44).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 18).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 44).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 52).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 390).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 126).

Common Name: Smooth Shadow-crust Lichen

Type: Foliose

Substrate(s): Corticolous

Years Noted: 2019; 2023-2024

Identified and First Noted By: Nur Ritter

Comments:
A somewhat tentative identification. Only noted once in the Gordon: Growing on a small branch from a fallen, mature Northern Red Oak (Quercus rubra).

iNaturalist Observations:

254724943 (Observed: 12/9/2024)

200118653 (Observed: 2/22/2024)

36735715 (Observed: 12/17/2019)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 343).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 266).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 118).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 200).

Common Names: Ciliate Wreath Lichen; Fringed Blister Lichen

Type: Foliose

Substrate(s): Corticolous & Bryophilous (Ocasionally)

Year Noted: 2025

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

257162625 (Observed: 1/2/2025)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 540).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 40).

Common Names: Pom-pom Shadow Lichen; Tiny Blister Lichen

Type: Foliose

Substrate(s): Corticolous & Saxicolous (Rarely)

Year Noted: 2019-2026

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

105171215 (Observed: 1/18/2022)

103057182 (Observed: 12/14/2021)

71302316 (Observed: 3/12/2020)

37886190 (Observed: 11/4/2019)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 87).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 543).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 383).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 119).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 41).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 355).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 120).

Common Names: Orange-cored Shadow Lichen; Orange Pith Lichen

Type: Foliose

Substrate(s): Corticolous, Bryophilous (Rarely), & Saxicolous (Rarely)

Year Noted: 2018-2025

Identified and First Noted By: Nur Ritter

Comments:
Quite common at the Gordon.

iNaturalist Observations:

328243390 (Observed: 11/25/2025)

105979807 (Observed: 2/1/2022)

104776291 (Observed: 1/11/2022)

94209623 (Observed: 9/2/2021)

70610684 (Observed: 3/3/2021)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 88).

Bennett, J. P. (2017). Common Lichens of Wisconsin. Madison, WI, Wisconsin State Herbarium: 18 (p. 9).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 543).

Brodo, I. M. and B. Craig (2004). Identifying Mixed Hardwood Forest Lichens, A Reference Notebook. Canadian Museum of Nature, Ottawa, Canada (p. 12).

Hale, M. E. (1979). How To Know The Lichens. Dubuque, IA, W.C. Brown Company Publishers (p. 118).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 384).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 120).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 41).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 55).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 41).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 46).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 355).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 118).

Common Names: Hooded Rosette Lichen; Hood-fruited Lichen

Type: Foliose

Substrate(s): Corticolous, Lignicolous, & Saxicolous (Occasionally)

Year Noted: 2021

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

70528678 (Observed: 3/3/2021)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 76).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 549).

Brodo, I. M. and B. Craig (2004). Identifying Mixed Hardwood Forest Lichens, A Reference Notebook. Canadian Museum of Nature, Ottawa, Canada (p. 13).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 41).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 34).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 47).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 121).

Common Names: Hoary Rosette Lichen; Goat Lichen

Type: Foliose

Substrate(s): Corticolous & Lignicolous

Years Noted: 2021-2022; 2025-2026

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

324929360 (Observed: 11/4/2025)

108596943 (Observed: 3/14/2022)

102183872 (Observed: 11/29/2021)

Literature:

Bennett, J. P. (2017). Common Lichens of Wisconsin. Madison, WI, Wisconsin State Herbarium: 18 (p. 9).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 549).

Brodo, I. M. and B. Craig (2004). Identifying Mixed Hardwood Forest Lichens, A Reference Notebook. Canadian Museum of Nature, Ottawa, Canada (p. 14).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 36).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 41).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 37*).

Note: An asterisk after a page number signifies that the species is only mentioned on that page.

Common Name: Rosette Lichens

Type: Foliose

Substrate(s): Saxicolous

Year Noted: 2020-2021

Identified and First Noted By: Nur Ritter

Comments:
Likely either Physcia aipolia or P. stellaris.

iNaturalist Observations:

38903080 (Observed: 2/18/2020)

Common Names: Lace-tipped Lichen; Mealy Rosette Lichen

Type: Foliose

Substrate(s): Corticolous, Lignicolous, & Saxicolous (Occasionally)

Years Noted: 2018-2019; 2021-2026

Identified and First Noted By: Nur Ritter

Comments:
Frequently encountered in the GNA.

Note: This species is very tolerant of air pollution.

iNaturalist Observations:

325025825 (Observed: 11/4/2025)

199304090 (Observed: 2/14/2024)

100074194 (Observed: 11/1/2021)

99973595 (Observed: 10/28/2021)

40813094 (Observed: 10/21/2019)

38904116 (Observed: 1/14/2020)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 77).

Bennett, J. P. (2017). Common Lichens of Wisconsin. Madison, WI, Wisconsin State Herbarium: 18 (p. 10).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 555).

Brodo, I. M. and B. Craig (2004). Identifying Mixed Hardwood Forest Lichens, A Reference Notebook. Canadian Museum of Nature, Ottawa, Canada (p. 15).

Frantz, M. W., et al. (2018). Lichens of West Virginia: Ecological Indicators of Habitat Types. Morgantown, WV., West Virginia University (p. 31).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 122).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 41).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 22).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 42).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 49).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 361).

Common Names: Star Rosette Lichen; Gray Star Lichen

Type: Foliose

Substrate(s): Corticolous, Lignicolous (Rarely), and Saxicolous (Rarely)

Years Noted: 2020-2021; 2024-2026

Identified and First Noted By: Nur Ritter

Also Noted By: Noah Long;

iNaturalist Observations:

87901621 (Observed: 2/26/2020)

52389321 (Observed: 4/9/2020)

102783207 (Observed: 12/7/2021)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 78).

Bennett, J. P. (2017). Common Lichens of Wisconsin. Madison, WI, Wisconsin State Herbarium: 18 (p. 10).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 558).

Brodo, I. M. and B. Craig (2004). Identifying Mixed Hardwood Forest Lichens, A Reference Notebook. Canadian Museum of Nature, Ottawa, Canada (p. 16).

Frantz, M. W., et al. (2018). Lichens of West Virginia: Ecological Indicators of Habitat Types. Morgantown, WV., West Virginia University (p. 23).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 42).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 37).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 43).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 50).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 363).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 122).

Common Names: Powdery-margined Cryptic Shade Lichen; Cryptic Rosette Lichen

Type: Foliose

Year Noted: 2021

Identified and First Noted By:

Also Noted By: Nur Ritter

iNaturalist Observations:

336610413 (Observed: 11/1/2021)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 82).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 560).

Brodo, I. M. and B. Craig (2004). Identifying Mixed Hardwood Forest Lichens, A Reference Notebook. Canadian Museum of Nature, Ottawa, Canada (p. 17).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 400r).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 124).

Common Name: Bare-bottomed Sunburst Lichen

Synonyms: Xanthomendoza weberi

Type: Foliose

Substrate(s): Corticolous & Saxicolous (Occasionally)

Years Noted: 2018; 2021; 2023

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

185002630 (Observed: 9/25/2023)

72773171 (Observed: 4/2/2021)

Literature:

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 267; 378).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 45).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 464*).

Note: An asterisk after a page number signifies that the species is only mentioned on that page.

Common Names: Bristly Beard Lichen; Shaggy Beard Lichen

Type: Fruticose

Substrate(s): Corticolous

Years Noted: 2022; 2025

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

320894023 (Observed: 10/14/2025)

137669598 (Observed: 10/5/2022)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 724).

Frantz, M. W., et al. (2018). Lichens of West Virginia: Ecological Indicators of Habitat Types. Morgantown, WV., West Virginia University (p. 41).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 214).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 50).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 74).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 61).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 72).

Common Names: Dense Twig Lichen; Sinewed Ramalina

Type: Fruticose

Year Noted: 2025

Identified and First Noted By: Nur Ritter

Literature:

Bennett, J. P. (2017). Common Lichens of Wisconsin. Madison, WI, Wisconsin State Herbarium: 18 (p. 16).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 621).

Frantz, M. W., et al. (2018). Lichens of West Virginia: Ecological Indicators of Habitat Types. Morgantown, WV., West Virginia University (p. 39).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 46).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 72).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 58).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 70).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 135).

Common Name: Twig Lichen

Type: Fruticose

Substrate(s): Corticolous

Year Noted: 2021

Identified and First Noted By: Nur Ritter

iNaturalist Observations:

70219005 (Observed: 2/26/2021)

Common Names: Sulphur Dust Lichen; Glowing Teardrop

Type: Leprose-Crustose

Substrate(s): Saxicolous

Year Noted: 2021

Identified and First Noted By: Nur Ritter

Comments:
Distinctive crust lichen. Almost always found on stone. Thus far, known in the Gordon from a single 'occurrence.'

iNaturalist Observations:

70358251 (Observed: 2/28/2021)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 596).

Common Name: Dust Lichen

Type: Leprose-Crustose

Substrate(s): Saxicolous

Year Noted: 2021

Identified By: G. Perlmutter (iNaturalist)

First Noted By: Nur Ritter

Common Names: Stubby-stalked Cladonia; Bank Lichen

Type: Squamulose

Substrate(s): Corticolous, Lignicolous, Saxicolous, & Terricolous

Year Noted: 2018-2022

Identified By: C.J. Pasiche Lisboa (iNaturalist)

First Noted By: Nur Ritter

Comments:
To date, a number of occurrences have been noted at the Gordon. One population was noted growing on a large, fallen Black Cherry (Prunus serotina) that still had much of its bark. A number of other occurrences have been noted on heavily decayed, decorticated stumps (all were likely hardwood species).

iNaturalist Observations:

38836548 (Observed: 10/18/2019)

37686398 (Observed: 1/13/2020)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 242).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 168).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 133).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 10).

Opdyke, M. R. and J. R. Daugherty (2016). Checklist of lichens of Crawford County, Pennsylvania. Evansia 33(1): 9-13 (p. 1).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 131).

Common Names: Powder Horn Lichen; Common Powderhorn

Type: Squamulose

Substrate(s): Corticolous, Lignicolous, & Terricolous

Years Noted: 2019-2022; 2024

Identified and First Noted By: Nur Ritter

Also Noted By: CAGksq; Noah Long;

Comments:
Fairly common and widespread at the Gordon. At this time, the most commonly encountered Cladonia.

iNaturalist Observations:

104421442 (Observed: 10/16/2021)

102418210 (Observed: 12/1/2021)

95682665 (Observed: 9/21/2021)

90808017 (Observed: 8/6/2021)

85457023 (Observed: 7/2/2021)

70550182 (Observed: 3/3/2021)

70416706 (Observed: 4/14/2020)

70415231 (Observed: 8/17/2020)

37556491 (Observed: 10/25/2019)

37556780 (Observed: 1/13/2020)

51630751 (Observed: 7/1/2020)

Literature:

Bennett, J. P. (2017). Common Lichens of Wisconsin. Madison, WI, Wisconsin State Herbarium: 18 (p. 14).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 247).

Frantz, M. W., et al. (2018). Lichens of West Virginia: Ecological Indicators of Habitat Types. Morgantown, WV., West Virginia University (p. 43).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 174).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 10).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 113*).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 52*).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 60).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 141*).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 42).

Note: An asterisk after a page number signifies that the species is only mentioned on that page.

Common Names: Smooth Horn Lichen; Spoon Lichen; Smooth Cladonia

Type: Squamulose

Substrate(s): Lignicolous, & Terricolous

Year Noted: 2020-2021

Identified and First Noted By: Nur Ritter

Comments:
Only a single 'population' noted in the Gordon. This was on a large, fallen Black Cherry (Prunus serotina). As of late-winter 2021, all the bark had fallen off this tree and no Cladonia was observed.

iNaturalist Observations:

37685705 (Observed: 1/17/2020)

69588404 (Observed: 1/21/2020)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 256).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 185).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 14).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 137).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 47).

Common Names: Lipstick Powderhorn; White Pin Lichen; Pin Lichen; Scarlet Pin Lichen

Type: Squamulose

Substrate(s): Corticolous & Lignicolous

Years Noted: 2021-2022; 2025-2026

Identified and First Noted By: Nur Ritter

Comments:
To date, a single 'occurrence' noted: growing inside a hollowed-out wooden post.

iNaturalist Observations:

70343150 (Observed: 2/28/2021)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 105).

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 259).

Frantz, M. W., et al. (2018). Lichens of West Virginia: Ecological Indicators of Habitat Types. Morgantown, WV., West Virginia University (p. 46).

Hinds, J. W. and P. L. Hinds (2007). The Macrolichens of New England. New York, NY, The New York Botanical Garden Press (p. 188).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 142).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 16).

Orr, R. (2011). Guide to the Lichens of Howard County, MD. Self-published. howardbirds.org/flora_fauna/hocolichensfordevices-2nd_ed.pdf: 64 (p. 51).

Showman, R. E. and R. Klips (2015). Common Lichens of Ohio: Field Guide. Columbus, OH, Ohio Division of Wildlife: 79 (p. 61*).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 139).

Walewski, J. (2007). Lichens of the North Woods. North Woods Naturalist Series. Duluth, MN, Kollas Stensas Publishing (p. 43).

Note: An asterisk after a page number signifies that the species is only mentioned on that page.

Common Name: Sulphur Stubble Lichen

Type: Stubble Lichens

Substrate(s): Corticolous (occasionally), Lignicolous, and Saxicolous

Year Noted: 2022-2025

Identified and First Noted By: Nur Ritter

Also Noted By: Kathryn Krueger; Miranda Davies;

iNaturalist Observations:

109916637 (Observed: 3/29/2022)

109241468 (Observed: 3/22/2022)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 222).

McMullin, T. and F. Anderson (2014). Common Lichens of North America. A Field Guide. Memoirs of the New York Botanical Garden, Volume 112. New York, NY, New York Botanical Garden (p. 100*).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 122).

Note: An asterisk after a page number signifies that the species is only mentioned on that page.

Common Names: Slender Stubble Lichen; Snag Pins

Type: Stubble Lichens

Substrate(s): Lignicolous

Year Noted: 2019

Identified and First Noted By: Nur Ritter

Comments:
To date, a single occurrence known for the GNA. Growing on a large, fallen, Tulip Tree (Liriodendron tulipifera) log. Reportedly, this species is an indicator of good habitat.

iNaturalist Observations:

40255801 (Observed: 1/29/2019)

Literature:

Brodo, I. M., et al. (2001). Lichens of North America. New Haven, CT, Yale University Press (p. 192*).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 96).

McGrath, J. K. (1991). A Checklist of the Lichens of Pennsylvania (including distributional maps by county for Lichen species). Lansdowne, PA, Delaware Valley Conservation Society (p. 34).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 300).

Note: An asterisk after a page number signifies that the species is only mentioned on that page.

Common Names: Polypore Club Lichen; Fairy Pin; Black Matchstick Fungus

Type: Stubble Lichens

Substrate(s): Fungicolous

Year Noted: 2018-2024

Identified and First Noted By: Nur Ritter

Also Noted By: Arriana Rivellini; kojo1019; Maribeth Beatty; Noah Long; Paige Vermeulen

Comments:
This diminutive species is known to grow only on the caps of Trichaptum biforme (Violet-toothed Polypore) and other species of Trichaptum. Extremely common at the Gordon: wherever we see older Violet-toothed Polypore, we almost always find Polypore Club Lichen.

iNaturalist Observations:

108195948 (Observed: 3/8/2022)

104409061 (Observed: 1/4/2022)

96932068 (Observed: 10/1/2021)

48171189 (Observed: 6/1/2020)

46023678 (Observed: 5/12/2020)

70254819 (Observed: 2/26/2021)

40809658 (Observed: 3/27/2019)

42226906 (Observed: 4/14/2020)

66309426 (Observed: 12/8/2020)

Literature:

Allen, J. L. and J. C. Lendemer (2021). Urban Lichens. A Field Guide for Northeastern North America. New Haven, CT, Yale University Press (p. 60).

Lendemer, J. C. and N. Noell (2018). Delmarva Lichens: An Illustrated Manual. Bronx, NY, The Torrey Botanical Society, New York Botanical Garden (p. 97).

Tripp, E. M. and J. C. Lendemer (2020). Field Guide to the Lichens of Great Smoky Mountains National Park. Knoxville, TN, University of Tennessee Press (p. 351).