Observation 19466: Heterodermia obscurata (Nyl.) Trevisan
When: 2009-03-15
Herbarium specimen reported

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

39292
Dotson Point Trail, 2009_03_15
39293
Dotson Point Trail, 2009_03_15
42416
thallus, 10x
42417
lobes and soredia, 10x
42418
lobes and soredia, 20x
42419
soredia, 20x
42420
soredia at and under lobe tips, 40x
42421
lobes and soredia, 25x
42422
lobes, black rhizines with clear tips, 40x
42423
pruina, 40x
42424
pruina, 80x
42425
pruina on lobe tips, 80x
42426
branched rhizine, 50x
42427
branched rhizine, 100x
42428
undersurface with yellow hyphae, 80x
42429
fibrous and webby underside of outer lobes, with yellow-pigmented hyphae and squarrose rhizines, 40x
42430
yellow hyphal strands in open fibrous network under outer lobes, 80x

Proposed Names

28% (1)
Eye3 Eyes3
Used references: Brodo, Sharnoff, Sharnoff, pp.339-340

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

Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2009-03-16 22:13:01 PDT (-0700)
Last modified: 2009-03-16 22:13:01 PDT (-0700)
Viewed: 262 times, last viewed: 2016-11-22 16:05:32 PST (-0800)
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