Observation 48447: Lecidea laboriosa

on crumbling, exposed granitic outcrop on steep slope in chaparral at around 2000’

The Nash flora doesn’t readily distinguish the common L. laboriosa from the southern California endemic L. hassei. They talk about the former being most common at higher elevation, and only being at most weakly pruinose. TLC is required presumably to determine the critical presence of schizopeltic acid (present only in L. hassei).


apothecial section in water at 1000x
apothecial section in water at 1000x, cross-polarized
spores in ascus and blue-green epihymenium in water at 1000x

Proposed Names

-29% (1)
Used references: Lichen Flora of the Greater Sonoran Desert Region, Vol. II. 2004. Hertel, H. & C. Printzen.
Based on microscopic features: spores ~3.5 µm wide
Based on chemical features: all spot tests negative
58% (1)
Eye3 Eyes3
Recognized by sight: apparently L. hassei should be almost subsquamulose? forget where I read that, but at any rate, this is certainly within range of variation for laboriosa…

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Created: 2010-07-11 17:31:54 HST (-1000)
Last modified: 2011-01-21 16:56:56 HST (-1000)
Viewed: 27 times, last viewed: 2018-05-02 09:56:21 HST (-1000)
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