Observation 34998: Physcia stellaris (L.) Nyl.
When: 2010-02-07
Herbarium specimen reported

Notes: Locality: 35°12’47.92"N, 85°55’20.20"W, el. 586 m. Woodlands.

Substrate and habitat: Growing on a branch of scarlet oak, Quercus coccinea, brought to the ground by recent rain storms, in a park-like residential area bordering oak-dominated eastern deciduous woodland at the western rim of the Cumberland Plateau.

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

Identification: A commonly encountered, small Physcia rosette lichen with abundant apothecia; medulla K-. The morphologically similar Physcia aipolia and Physcia pumilior have medulla K+ yellow. Some references stress the lack of conspicuous maculae in Physcia stellaris (Brodo, et al., 2001, p.558), but in their key to Physcia of the Ozarks, Harris and Ladd (2005) mention that it is “typically with prominent white spots.” The present specimen is prominantly maculate.

References:
Sharnoff’s Physcia stellaris gallery
CNALH images, description, and locality map, and a larger, interactive locality map.

Voucher specimen:
United States, Tennessee, Franklin County, Sewanee, Woodlands. 07 Feb 2010. Chris Parrish 0040, det. James C. Lendemer (NY).

Common name: star rosette lichen

Species Lists

Images

81660
apothecia, 50x
81654
81655
apothecia, 16x
81659
apothecia, 16x
81661
apothecia, 50x
81662
marginal lobes, 32x
81663
marginal lobes, 40x
81664
maculae, 50x
81665
maculae, 80x
81666
undersurface, 80x
81667
rhizines, 100x

Proposed Names

85% (1)
Eye3 Eyes3
Used references: Specimen identified by James C. Lendemer (NY).

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2010-03-22 18:19:33 PDT (-0700)
Last modified: 2010-03-22 18:19:33 PDT (-0700)
Viewed: 284 times, last viewed: 2016-04-08 18:50:38 PDT (-0700)
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