Observation 34056: Pycnothelia papillaria Dufour
When: 2010-02-20
Herbarium specimen reported

Notes: Location: 35°12’45.15"N 85°53’47.26"W el. 586 m, Sewanee-St.Andrew’s Trail.

Substrate and habitat: Growing on a clump of sandy soil adhering to the base of an emergent sandstone rock near the rim of a canyon, in oak-hickory woodland on the western rim of the Cumberland Plateau.

Chemistry:
thallus: C-, K+ pale yellow, KC-, Pd+ pale yellow.
Both the K+ pale yellow and Pd+ pale yellow spot tests take 1-2 min to develop, and the resulting pale yellow color is hardly evident against the color of the lichen’s outer cortex, but it becomes clearly visible on a piece of absorbent white paper brought into contact with the damp thallus.

Identification: Pale gray, hollow, finger-like, branching podetia emerging from a persistent, granular thallus.

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

Voucher specimen:
United States, Tennessee, Franklin County, Sewanee, Sewanee-St.Andrew’s Trail. 20 Feb 2010. Chris Parrish 0061.

Common name: gnome fingers

Species Lists

Images

79236
79237
79238
granular thallus, 7.1x
79239
granular thallus, 16x
79240
granular thallus, 25x
79241
granular thallus, 50x
79242
podetia, 7.1x
79243
podetia, 25x
79244
podetia, 32x
79245
podetia with constricted bases, 40x
79246
apical pycnidium, 115x
79247
hollow podetium, 40x

Proposed Names

28% (1)
Eye3 Eyes3
Used references: Brodo, Sharnoff, and Sharnoff, 2001, p.610; Harris and Ladd, 2005, p.206

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

Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2010-02-24 03:45:09 CET (+0100)
Last modified: 2010-02-24 03:45:09 CET (+0100)
Viewed: 414 times, last viewed: 2016-10-26 15:40:30 CEST (+0200)
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