Observation 12941: Lecidea atrobrunnea subsp. atrobrunnea
When: 2008-10-15
Herbarium specimen reported

Notes: Subsquamulose lichen, on granite.
THALLUS: squamules loosely appressed, 1-2 mm wide, rich shiny brown to olive greenish in shade, margins black with white dust, darker below; section: irregular hyaline necrotic layer on top, cortex with brownish outer layer, algal layer quite thick and continuous, medulla strongly POL+ whitish not clearing in K, very thick dark brown epihymenium-like cortex of round cells below; all K- and C- and I-
APOTHECIA: black, laminal, lecideine; rim black, shiny, prominant, even smooth; disc black, epruinose, flat; exciple dark brown, not at all greenish, round cells; no mature apothecia in my sample unfortunately; paraphyses not conglutinated, very thin, somewhat branched
SPORES: didn’t find any

Images

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Lecidea in bottom left corner.
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Lecidea in upper right.
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Two little Rhizocarpon amid sea of Lecidea.
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Rhizocarpon off on right side.
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Aspicilia center to left, brown in upper right is Lecidea, and the gray-and-black along bottom to right is Rhizocarpon.
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Mostly Aspicilia, brown is Lecidea, little gray-and-black is Rhizocarpon.
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Lecanora muralis on left, and Rhizoplaca melanophthalma in center-right, the rest (the brown) is all Lecidea atrobrunnea.
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Squamules, at 30×.
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Apothecial section, in water, at 100×.
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Apothecial section, in water, at 100x, cross-polaraized.
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Thallus section, in water, at 400×.

Proposed Names

87% (1)
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Used references: Nash’s Sonoran Flora

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2008-10-20 07:19:20 CEST (+0200)
Last modified: 2008-10-20 07:19:20 CEST (+0200)
Viewed: 16 times, last viewed: 2016-10-21 01:11:20 CEST (+0200)