Observation 127159: Alectoria ochroleuca (Hoffm.) A. Massal.
When: 2013-01-28

Notes: Jason – thought I’d run some lichens I was looking at past you.

I was confused because Brodo (2001) keys Gowardia nigricans (as Alectoria nigricans) as dull gray to yellowish gray at the base with blackened branch tips, occasionally entirely black, with pseudocyphellae raised, white. Alectoria ochroleuca keys in Brodo (2001) (p. 150) as pale greenish yellow or yellowish green with pseudocyphellae conspicuous and usually slightly raised, tips of branches usually becoming black or greenish black.

The “yellowish” possibility and “raised” pseudocyphellae are at odds with the latest word of Halonen et al. (2009) who have Gowardia as characteristically is pale/dark bicolorous to entirely black with pseudocyphellae usually plane, white, mainly 0.2-0.5 mm long. They state "Gowardia is easely distinguished from Alectoria on the basis of cortical pigments. Alectoria contains usnic acid and has a yellowish or greenish-yellow hue, while this substance is lacking in Gowardia, which instead has melanic pigments yielding a grayish to blackish color.

This seems to have a touch of yellow.

Proposed Names

55% (1)
Eye3 Eyes3
Recognized by sight: see notes below
Used references: Brodo, Irwin M., Sharnoff, Sylvia Duran and Sharnoff, Stephen (2001) Lichens of North America; Halonen, P. L. Myllys, S. Velmala, & H. Hyvärinen. 2009. Gowardia (Parmeliaceae)-a new alectorioid lichen genus with two species. The Bryologist 112(1): 138–146.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2013-01-28 17:38:24 GMT (+0000)
Last modified: 2013-01-28 17:38:25 GMT (+0000)
Viewed: 27 times, last viewed: 2015-04-01 23:37:56 BST (+0100)
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