Observation 204823: Physconia americana Essl.
When: 2015-05-21
(35.6282° -120.8831° 1150m)
Who: J-Dar
No herbarium specimen

Notes: On Valley Oak (Quercus lobata) bark in mixed oak forest at intersection of Klau Mine Road and Dodd Road.

Thallus grey, lobes pruinose, K- upper cortex, underside pale, rhizines black, squarrose and dense, apothecia pruinose with lobules on margin (new photos added, green due to being wet).

Proposed Names

-61% (2)
Recognized by sight
92% (2)
Eye3 Eyes3
Recognized by sight

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Hasty specimen review!
By: J-Dar
2015-05-23 12:22:23 CDT (-0500)

Sorry for that, not sure what happened but I surely did not look at it and made an odd choice based on a photo I saw somewhere. All features point to P. americana, thanks!

Note the little lobules around the apothecia
By: Jason Hollinger (jason)
2015-05-22 23:20:45 CDT (-0500)

Very typical of this species. Note that K- cortex should rule out Physcia, unless you meant the medulla was K-? Still, dense pruina, dense black rhizines, lobules, all point to Physconia americana

Created: 2015-05-22 22:42:44 CDT (-0500)
Last modified: 2015-05-23 12:20:58 CDT (-0500)
Viewed: 44 times, last viewed: 2017-06-20 03:34:00 CDT (-0500)
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