Observation 10254: Pertusaria saximontana Wetmore

When: 2008-06-24

Collection location: Juniper Mountains, Yavapai Co., Arizona, USA [Click for map]

Who: Jason Hollinger (jason)

Specimen available

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.


10x magnification
30x magnification
apothecial section in water, at 100×.
apothecial section in water, at 100x, in cross-polarized light.
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: 2008-08-31 14:35:03 CDT (-0400)
Last modified: 2008-08-31 14:35:03 CDT (-0400)
Viewed: 17 times, last viewed: 2017-06-05 02:35:12 CDT (-0400)