Observation 60228: Aspicilia A.Massal.

When: 2010-11-07

Collection location: Dabney Creek, Madison Co., Arkansas, USA [Click for map]

Who: Jason Hollinger (jason)

Specimen available

on siliceous sandstone ledges on south-facing slopes above creek, not too shaded

Harris & Ladd 2005 narrows it down to A. laevata (thin thallus, near permanent water) and A. verrucigera (thick thallus, in uplands), from which I would naturally conclude the latter given the habitat high on the slopes above the creek. But according to Owe-Larsson et al., A. verrucigera has truly moniliform paraphyses (3-5 cells swollen) and much larger spores (16-19 × 10-13 µm). Unfortunately I have no description of A. laevata.


K+y spot test on cortex
apothecial section in water at 100x
apothecial section in water at 100x, cross-polarized
spores in water at 400x

Proposed Names

29% (1)
Eye3 Eyes3
Used references: Ozark Keys, Harris & Ladd 2005.
Lichen Flora of the Greater Sonoran Desert Region, Vol. III, Nash et al. 2007 (treatment for Aspicilia by Owe-Larsson et al.)
Based on microscopic features: large POL+ crystals in margin not clearing in K; no granules in epoihymenium; last 2-3 cells of paraphyses swollen (submoniliform); spores ~8-10 × 5 µm, simple, smooth, hyaline
Based on chemical features: cortex K+y, UV-

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Eye3 = Observer’s choice
Eyes3 = Current consensus


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Created: 2010-12-05 00:38:29 WIB (+0700)
Last modified: 2010-12-05 00:38:34 WIB (+0700)
Viewed: 13 times, last viewed: 2018-02-16 17:39:47 WIB (+0700)
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