Observation 10254: Pertusaria saximontana Wetmore
When: 2008-06-24
Herbarium specimen reported

Notes: crustose lichen, on exposed juniper wood
THALLUS: thick, areolate-bullate, grey, areoles ~1 mm, K-, C-
MEDULLA: white, K-, C-
APOTHECIA: cryptolecanorine, black, epruinose, sunken, cortex K-; epihymenium K+ pale violet, C+ faint reddish, blackish-brownish; hymenium clear; hypothecium clear, with large POL+ white crystals; abundant algae in margin; paraphyses very fine and tangled but easily separating in K; asci huge, strongly IKI+ blue thick outer layer
SPORES: rare, 1-2 per ascus?, clear, textured, large, elliptical to oblong

Superficially much like an Aspicilia, but asci and spores are totally different. This appears to be quite common on fenceposts and weathered juniper wood throughout the Colorado Plateau.

Images

19097
10x magnification
19098
30x magnification
19099
apothecial section in water, at 100×.
19100
apothecial section in water, at 100x, in cross-polarized light.
19101
Apothecial section, in K, at 100×. Epihymenium reacting weakly violet.

Proposed Names

87% (1)
Eye3 Eyes3
Used references: Nash’s Sonoran Flora

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2008-09-01 02:35:03 CST (+0800)
Last modified: 2008-09-01 02:35:03 CST (+0800)
Viewed: 16 times, last viewed: 2016-10-26 11:49:26 CST (+0800)