Observation 31996: Punctelia stictica (Duby) Krog
When: 2009-12-23
No herbarium specimen

Notes: Locality: 30°40’19.01"N, 30°40’19.01"N, el. 1750-2060 m, montane slopes S of McDonald Observatory along Hwy 118

Substrate and habitat: Growing on rock in an open woodland of piñon, juniper, and oak.

Common name: speckled shield lichen

Proposed Names

12% (2)
Eye3
Used references: Brodo, Sharnoff, and Sharnoff, 2001, pp.605-610
59% (2)
Eyes3
Recognized by sight: On rock; brownish at edges and on some central lobes; large granular soredia
Used references: Brodo et al. 2001. Lichens of North America.

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Remarkable specimen!
By: Jason Hollinger (jason)
2012-01-29 22:58:06 AST (+0300)

I didn’t appreciate how unusual this record would be. This species is known from the Rockies and Arizona mountains and a few other odd places (Puget Sound, western Great Lakes, San Francisco area, one area in central Mexico), but according to my (extensive) research, it’s never been collected in Texas.

CNALH map

But I have to agree with Brendan, for whatever it’s worth. There aren’t that many other options. Definitely not P. punctilla (much smaller, strictly California species). Not P. jeckeri or P. caseana since those are strictly epiphytes and they have powdery soralia and smaller pseudocyphellae and I’ve never seen them with that distinctive shiny brown coloration. P. missouriensis often grows on rock, but the “soredia” are really large coarse pseudo-corticate things, only a few per soralia, not like this. There’s nothing else.

Nicely done! And lovely photos into the bargain. :)

Created: 2010-01-14 22:26:50 AST (+0300)
Last modified: 2012-01-29 22:51:30 AST (+0300)
Viewed: 138 times, last viewed: 2016-11-09 14:07:34 AST (+0300)
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