Observation 208938: Chrysothrix Mont.
When: 2015-07-04
(35.4913° -120.6627° 271m)
Who: J-Dar

Notes: Occurs in a dry oak woodland setting, common to very abundant on coast live oak (Quercus agrifolia) trunk bark and branches. Essentially no thallus, just powdery soredia. Overall color is pea green (micro photos are too yellow), but there are small areas when you look close that are blue-green, maybe something different.
Sonoran Flora only has 2 species, but 4 are reported for this County, so not sure what species this is. C. candelaris and C. xanthina are candidates.

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Latest word I heard on this
By: Jason Hollinger (jason)
2015-07-05 17:17:21 CDT (-0400)

is Chrysothrix “is badly in need of revision” in western North America. In the key for eastern US it mostly hinges on granule size: fine granules (~15µm) is usually C. xanthina, coarse granules (~35-80µm) may be C. candelaris (but that hasn’t been seen in eastern US!)

Created: 2015-07-05 16:40:21 CDT (-0400)
Last modified: 2015-07-05 16:40:26 CDT (-0400)
Viewed: 10 times, last viewed: 2015-08-20 18:09:30 CDT (-0400)
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