Observation 44451: Sticta fragilinata McDonald
When: 2009-12-01
Herbarium specimen reported

Notes: This apparently looked different enough from the standard Sticta beauvoisii that I collected a fragment for later ID. Turns out it really was different — the yellow medulla, far from just being a sign of a dying thallus!, is actually an anthraquinone (K+ deep wine-red). Makes it the rare Sticta fragilinata. I don’t know if the lobulate margin is typical of the species or now.

Images

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tiny bit of medulla and cyanobacteria exposed on lobe tip
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underside
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underside

Proposed Names

87% (1)
Eye3 Eyes3
Based on chemical features: yellow medulla is K+r

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2010-04-19 18:28:35 EDT (-0400)
Last modified: 2010-04-19 18:28:38 EDT (-0400)
Viewed: 71 times, last viewed: 2016-10-25 18:03:55 EDT (-0400)
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