Observation 12289: Aspicilia confusa Owe-Larss & a. Nordin (2007)
When: 2007-08-24
Herbarium specimen reported

Notes: crust lichen, on granitic rock
THALLUS: dark gray, areolate, K-
MEDULLA: white
ALGAE: green
APOTHECIA: ~1 per areole, sunken, disk black, epihymenium greenish brown turning pure brown in K, hymenium clear, hypothecium clear, asci with K/I- thickened tip, paraphyses narrow & anastomosing & with about 4 swollen cells at end
SPORES: 8 per ascus, elliptical, smooth, around 20-25 × 12-14 µm, clear, simple

Clearly keys to A. confusa (common) or A. fumosa (not common): former has concolorous to white-lined rims and spores 19-27 × 11-16 µm; latter has olive to brown contrasting rims and spores 18-22 × 10-14 µm. Otherwise
they are essentially the same. Mine is clearly the former. This is also reputedly common in southern California mountains.

Images

24750
at 10x
24744
24751
at 30x
24752
apothecial section, in water, at 100x
24753
apothecial section, in water, at 100x, cross-polarized
24754
apothecial section, in K, at 100x

Proposed Names

87% (1)
Eye3 Eyes3
Used references: Nash’s Sonoran Flora
Based on microscopic features
Based on chemical features: K-

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2008-10-10 17:01:05 CDT (-0400)
Last modified: 2008-10-10 17:01:05 CDT (-0400)
Viewed: 22 times, last viewed: 2016-10-23 05:42:13 CDT (-0400)