Observation 34851: Phaeophyscia pusilloides (Zahlbr.) Essl.
When: 2010-03-12
Herbarium specimen reported

Notes: Location: 35°12’38.36"N 85°54’0.40"W el. 587 m, Beckwith’s Point Trail.

Substrate and habitat: Many rosettes and small irregular clumps of less-organized squamules and thalli growing from 0.5 to 3 m above the ground on a slender hardwood tree with rough, furrowed bark and about 12 cm DBH, in oak-hickory woodland near the rim of a canyon, on the western rim of the Cumberland Plateau. The squamulate growth form was on a nearby smooth-barked tree.

Chemistry:
medulla: C-, K-, KC-, Pd-.

Identification: Phaeophyscia growing in the form of rosettes, fields of squamules and short lobes, or various stages in between; thallus deep green when wet, and brownish gray when dry; soredia prominently displayed as light greenish pompons held high on the upraised ends of short lateral branches, producing a very distinctive effect; medulla white; rhizines black, abundant, forming a wiry cushion underneath and around the rosettes

Note:
The small rosette on the lefthand side of photos 81320, 81321, and 81323 is Pyxine subcinerea.

References:
Sharnoff’s Phaeophyscia pusilloides gallery
CNALH images and locality map, and a larger, interactive locality map.

Voucher specimen:
United States, Tennessee, Franklin County, Sewanee, Beckwith’s Point Trail. 12 Mar 2010. Chris Parrish 0075, det. James C. Lendemer (NY).

Common name: pompon shadow lichen.

Species Lists

Images

81316
81317
81318
81319
81320
81321
81322
81323
81324
thallus, 10x
81325
dense mat of rhizines, 25x
81326
greenish soralia, 32x
81327
greenish soralia, 40x
81328
damage exposes white medulla, 63x
81329
flowing surface texture, 100x
81330
tangled black rhizines and black lower cortex, 50x

Proposed Names

85% (1)
Eye3 Eyes3
Used references: Hinds and Hinds, 2005, pp.375-387

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2010-03-16 02:21:59 CDT (-0400)
Last modified: 2010-06-09 03:02:19 CDT (-0400)
Viewed: 375 times, last viewed: 2016-11-06 13:05:41 CST (-0500)
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