When: 2009-02-14

Collection location: Sewanee, Franklin Co., Tennessee, USA [Click for map]

Who: Chris Parrish (kitparrish)

Specimen available

35°13’2.20"N, 85°55’18.04"W, el. 544 m. Running Knob Hollow.
35°12’59.44"N, 85°54’30.99"W, el. 444 m, Shake Rag Hollow

Substrate and habitat: Growing on inclined and nearly vertical surfaces of large boulders on the talus slopes below the western escarpment of the Cumberland Plateau.

This lichen changes color when it gets wet, from a pale silvery brownish gray when dry to noticeably greenish when wet. The color then reverts back as the thallus dries out. This color change is noticeable in the photos.

Running Knob Hollow, 2009_02_14: 36416, 38359-38361, 37105-37112
Shake Rag Hollow, 2009_03_18: 42580-42593

Note added on 08 Mar 2009: Thank you, Gary! The paper on Dermatocarpon of the Ozarks is available online.

Note added on 30 Apr 2009:
Identification: Specimens of this lichen from the robust population at Shake Rag Hollow (within 1 km of the original site in Running Knob Hollow) were determined by Gary Perlmutter of the UNC Herbarium to represent Dermatocarpon muhlenbergii. Gary cites the Dermatocarpon article in the Bryologist, 2008. Populations of this species from the eastern US were previously included in D. miniatum (Harris and Ladd, 2005).

Amtofta, Lutzoni, Miadlikowska, Dermatocarpon (Verrucariaceae) in the Ozark Highlands, North America, The Bryologist 111(1):1-40. 2008.

Voucher specimen: Tennessee, Franklin County, Sewanee, Shake Rag Hollow, 18 Mar 2009, Chris Parrish 0022, det. Gary Perlmutter (NCU

Common name: common stippleback

Species Lists


Shake Rag Hollow, 2009_03_18
Running Knob Hollow, 2009-02-14
drying thallus, 7.1x
dryer thallus, 7.1x
moist thallus, 12.5x
perithecia, 16x
perithecia, 40x
perithecia, 50x
underside of thallus, 7.1x
underside of perithecium, 50x
Running Knob Hollow, 2009-02-14
Running Knob Hollow, 2009-02-14
Running Knob Hollow, 2009-02-14
Shake Rag Hollow, 2009_03_18
Shake Rag Hollow, 2009_03_18
Shake Rag Hollow, 2009_03_18
Shake Rag Hollow, 2009_03_18
Shake Rag Hollow, 2009_03_18
Shake Rag Hollow, 2009_03_18
Shake Rag Hollow, 2009_03_18
thallus, 7.1x
perithecia, 32x
thallus “stress fractures,” 20x
undersurface, 7.1x
undersurface under marginal lobe, 25x
undersurface, very few rhizines, almost none, 25x

Proposed Names

28% (1)
Used references: Brodo, Sharnoff, and Sharnoff, p.298
85% (2)
Used references: The Bryologist 111(1):1-40. 2008

Please login to propose your own names and vote on existing names.

= Observer’s choice
= Current consensus


Add Comment
suggest new key
By: Gary Perlmutter (gbperlmutter)
2009-03-05 17:08:36 PST (-0800)

There is a new revision of Dermatocarpon (Amtoft et al., “Dermatocarpon (Verrucariaceae) in the Ozarks, North America”, The Bryologist 111(1): 1-40 2008), complete with a key and species treatments. I suggest collecting a specimen and identify it using this new source.