Observation 102511: Trapelia M. Choisy
When: 2012-07-20
(34.225° -118.1284° 967m)
Herbarium specimen reported

Notes: HABITAT chaparral on west slopes; SUBSTRATE siliceous rock; ASPECT shaded; NOTES whitish crust, thin and continuous inside but with scattered tiny convex areoles near the margin, ~discrete brownish minutely granular soralia, alga chlorococcoid, medulla white, cortex K- C+pink KC+red UV- 350nm, medulla K- C- KC- UV- 350nm.

J. Lendemer’s key suggests Trapelia or perhaps Trapeliopsis bisorediata (this looks too thin, though). Trapelia placodioides has more obvious marginal lobes. Trapelia obtegens? Many of these are not mentioned in the Sonoran Flora.

From a distance this looked just like a thin whitish Lepraria, so I couldn’t say how common it is, as I typically ignore leprose things.

Images

241120
20120720-53.jpg
Thallus margin and soralia, at 30x, stacked.

Proposed Names

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Created: 2012-07-23 02:43:40 CDT (-0400)
Last modified: 2012-07-23 02:43:45 CDT (-0400)
Viewed: 47 times, last viewed: 2016-10-21 14:27:12 CDT (-0400)
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