Observation 18426: Dermatocarpon muhlenbergii
When: 2009-02-14
Herbarium specimen reported

Notes: Locations:
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.

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).

Reference:
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

Images

42581
Shake Rag Hollow, 2009_03_18
36416
Running Knob Hollow, 2009-02-14
37105
drying thallus, 7.1x
37106
dryer thallus, 7.1x
37107
moist thallus, 12.5x
37108
perithecia, 16x
37109
perithecia, 40x
37110
perithecia, 50x
37111
underside of thallus, 7.1x
37112
underside of perithecium, 50x
38359
Running Knob Hollow, 2009-02-14
38360
Running Knob Hollow, 2009-02-14
38361
Running Knob Hollow, 2009-02-14
42580
Shake Rag Hollow, 2009_03_18
42582
Shake Rag Hollow, 2009_03_18
42583
Shake Rag Hollow, 2009_03_18
42584
Shake Rag Hollow, 2009_03_18
42585
Shake Rag Hollow, 2009_03_18
42586
Shake Rag Hollow, 2009_03_18
42587
Shake Rag Hollow, 2009_03_18
42588
thallus, 7.1x
42589
perithecia, 32x
42590
thallus “stress fractures,” 20x
42591
undersurface, 7.1x
42592
undersurface under marginal lobe, 25x
42593
undersurface, very few rhizines, almost none, 25x

Proposed Names

28% (1)
Eye3
Used references: Brodo, Sharnoff, and Sharnoff, p.298
85% (2)
Eye3 Eyes3
Used references: The Bryologist 111(1):1-40. 2008

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

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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.

Created: 2009-02-15 09:27:44 PST (-0800)
Last modified: 2010-11-02 00:51:06 PDT (-0700)
Viewed: 342 times, last viewed: 2016-11-21 09:17:11 PST (-0800)
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