Observation 203179: Pannaria lurida (Mont.) Nyl.
When: 2015-04-21
No herbarium specimen

Proposed Names

13% (2)
Eye3
Recognized by sight
Based on microscopic features: No isidia
28% (1)
Recognized by sight: wrinkly thallus
Used references: Jørgensen. 2000. Survey of the Lichen Family Pannariaceae on the American Continent, North of Mexico.
56% (1)
Eyes3
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Apparently P. rubiginosa is replaced in the south by P. lurida and P. subfusca
By: Jason Hollinger (jason)
2015-04-21 18:15:01 PDT (-0700)

It’s a confusing group apparently, with several taxa all looking very similar:

P. rubiginosa – gray, smooth, margins raised and whitish, cool-temperate
P. lurida ssp. quercicola – gray, wrinkled, P+, warm-temperate hardwood forests
P. lurida ssp. russellii – gray, wrinkled, P-, cold-temperate fir forests
P. lurida ssp. lurida – tan, wrinkled, P±, subtropical, thick prothallus
P. subfusca – tan, smooth, margins inconspicuous, lowland southeast

Got all that?? Neither did I. I always forget and have to look it up again…

The wrinkling has to do with the thallus of P. lurida apparently being gelatinous when wet, causing it to swell when wet, and then wrinkles (stretch-marks essentially!) when it dries out. Usually it’s pretty subtle, but not here; yours is conspicuously wrinkly in places.

Created: 2015-04-21 17:45:34 PDT (-0700)
Last modified: 2015-04-22 07:54:16 PDT (-0700)
Viewed: 35 times, last viewed: 2016-10-23 11:36:00 PDT (-0700)
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