Notes: Location: 35°12’38.36"N, 85°54’0.40"W, el. 587 m, Beckwith’s Point Trail.
Substrate and habitat: Growing on the boles of forest trees within a few m of the ground, in oak-hickory woodland on the western rim of the Cumberland Plateau.
cortex: C-, K-, KC-, Pd- [K+ pale yellow expected]
medulla: C+ pinkish red (immediately, then fading and disappearing in a few sec), K-, KC+ reddish (immediately, then fading and disappearing in a few sec), Pd+ pale buffy yellow (slowly)
Identification: Densely isidiate, corticolous shield lichen of modest size, with sparse axillary cilia and black lower cortex, lightening to brown under marginal lobes. The medulla is C+ pinkish red, KC+ reddish, but both reactions are fleeting. The curvy outlines of the outer lobes and densely isidiate center of the shield are distinctive. Similar species include Parmelinopsis horrescens (isidia with cilia, medulla C-) and Myelochroa obsessa (saxicolous; medulla white, yellowish, or orange; medulla K+ yellow, Pd+ orange) (Hinds and Hinds, 2005, pp.325 and 342—343).
United States, Tennessee, Franklin County, Sewanee, Beckwith’s Point Trail. 13 Mar 2010. Chris Parrish 0077, det. James C. Lendemer (NY).
Common name: hairless-spined narrow-shield. Parmelinopsis minarum is so named to contrast with Parmelinopsis horrescens, which is called the hairy-spined narrow-shield. However, as far as names go, narrow-shield is weak, hairless-spined dubious, and someone missed a bet in not leveraging off of horrescens in some graphic way (e.g., horrific narrow-shield).
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|I’d Call It That||3.0||5.52||1||(kitparrish)|
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Created: 2010-03-14 01:11:09 MST (-0700)
Last modified: 2010-06-09 01:04:10 MDT (-0600)
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