Collection location: Sewanee, Franklin Co., Tennessee, USA [Click for map]
35°12’15.59"N, 85°55’13.48"W, el. 589 m, central campus.
Substrate and habitat: Growing on the boles of several hardwood trees, in a park-like area of remnant oak-dominated eastern deciduous woodland at the western rim of the Cumberland Plateau.
thallus: C-, K+ orangish yellow, KC- (dissolves much of the orangish yellow), Pd+ bright sulphur yellow
Pale gray, velvety-appearing crustose lichen with thallus diameter from a few cm to 8 or 10 cm, growing on the boles of deciduous trees within a few m of the ground. On closer examination, the “abundant isidioid hollow pustules … are diagnostic” (Harris and Ladd, 2005, p.149). The chemistry is also distinctive: thallus “Pd+ orange, K+ deep yellow, KC-, C-” (Brodo, p.424). Under a microscope, the thallus presents an unusual surface, appearing as though it were covered with wrinkled cellophane.
United States, Tennessee, Franklin County, Sewanee, central campus. 18 Feb 2010. Chris Parrish 0052.
Common name: pustule ragged-rim lichen
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Created: 2010-02-18 21:03:38 CST (-0500)
Last modified: 2010-02-18 21:03:38 CST (-0500)
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