When: 2009-03-15

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

Who: Chris Parrish (kitparrish)

Specimen available

Notes:
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.

Chemistry:
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

References:
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

Species Lists

Images

Dotson Point Trail, 2009_03_15
Dotson Point Trail, 2009_03_15
thallus, 10x
lobes and soredia, 10x
lobes and soredia, 20x
soredia, 20x
soredia at and under lobe tips, 40x
lobes and soredia, 25x
lobes, black rhizines with clear tips, 40x
pruina, 40x
pruina, 80x
pruina on lobe tips, 80x
branched rhizine, 50x
branched rhizine, 100x
undersurface with yellow hyphae, 80x
fibrous and webby underside of outer lobes, with yellow-pigmented hyphae and squarrose rhizines, 40x
yellow hyphal strands in open fibrous network under outer lobes, 80x

Proposed Names

28% (1)
Used references: Brodo, Sharnoff, Sharnoff, pp.339-340

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= Observer’s choice
= Current consensus

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