Collection location: Sewanee, Franklin Co., Tennessee, USA [Click for map]
Location: 35°13’49.26"N, 85°57’47.14"W, el. 575 m, Dotson Point Trail.
Substrate: Growing on the trunk of a large tree, about 2 m above the ground
Habitat: Oak-hickory woodland on the western rim of the Cumberland Plateau.
cortex C-, K+ yellow, KC-;
soredia K+ y
yellow hyphae on underside of lobes C- (C dissolves yellow color), K+ dark red (white hyphae remain white)
Characterization: corticolous fringe lichen with
(1) blue-green thallus
(2) soredia at and under lobe tips
(3) lobe tips with pruina
(4) branched and squarrose rhizines, black with translucent tips
(5) fibrous and cottony white undersides of marginal lobes, with yellow pigmented hyphae overlying predominantly white hyphal undersurface
(6) yellow hyphal strands in open, fibrous network under outer lobes
Lendemer, 2009, A synopsis of the lichen genus Heterodermia (Physciaceae, lichenized Ascomycota) in eastern North America, Opuscula Philolichenum 6: 1-36
McCune, 2003, Heterodermia in the Pacific Northwest
Sharnoff’s Heterodermia obscurata gallery
CNALH images, description, and locality map, and a larger, interactive locality map.
Voucher specimen: Tennessee, Franklin County, Sewanee, Dotson Point Trail, 15 Mar 2009, Chris Parrish 0008, det. Gary Perlmutter (NCU)
Common name: orange-tinted fringe lichen
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