Observation 29647: Pleopsidium flavum (Bellardi) Körber

When: 2009-12-06

Collection location: Coyote Ridge, San Jose, California, USA [Click for map]

Who: Alison rose

No specimen available

Notes:
I couldn’t decide between Pleopsidium flavum and Acarospora contigua for this neon yellow lichen. I cannot yet differentiate between dwarf fruticose lichens and crustose, but arrived at these two identifications by elimination of “Sterile crustose lichens,” and looking at the pictures in the Lichens of NA book.

I cut the areoles up extensively, and found no apothecia, which is why I do not think it is Acarospora, which, in the Lichens of the Sonoran Desert Region, is described to have one apothecium per areole. However, I did seem to find Pycnidia with ellipsoid conidia.

This lichen was found growing on serpentine rock, on an arid, exposed hillside.

Images

68186
Copyright © 2009 Rose
68185
Copyright © 2009 Rose
68187
Copyright © 2009 Rose

Proposed Names

24% (1)
Eye3 Eyes3
Used references: Lichens of North America
Based on chemical features: K-,C-

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Eye3 = Observer’s choice
Eyes3 = Current consensus

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Created: 2009-12-06 16:27:11 CST (-0500)
Last modified: 2009-12-06 16:27:11 CST (-0500)
Viewed: 86 times, last viewed: 2017-11-16 15:57:27 CST (-0500)
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