Observation 64145: Xanthoparmelia (Vain.) Hale

When: 2011-03-05

Collection location: Salt Point State Park, Sonoma Co., California, USA [Click for map]

Who: Debbie Viess (amanitarita)

No specimen available



Proposed Names

47% (2)
Recognized by sight: well, it’s a lichen!
56% (1)
Recognized by sight

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Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
oh yeah…
By: Debbie Viess (amanitarita)
2011-03-07 10:11:32 PST (-0800)

Xanthoparmelia sp. works for me!

I didn’t collect it, but I did admire it.

Need chemistry
By: Jason Hollinger (jason)
2011-03-07 09:38:57 PST (-0800)

Looks like X. coloradoensis, but there are look-alikes which differ mostly by chemistry. As for genus, any broad flat gray to greenish (the green is usually lost in photos) foliose lichens on exposed granite is almost certainly one of dozens of Xanthoparmelia (or Flavoparmelia baltimorensis on the east coast). Check color underneath (most are black, but some are pale to dark brown), lobe width (this would be considered broad), look for soredia or isidia (this has neither), how closely-attached the lobes are (this would be considered relatively loose), and lastly check if the lobes are more highly divided (lobulate or lacinulate) toward the center of the thallus (X. coloradoensis is, this one is intermediate to not). K test on medulla is important for final determination of species.

Created: 2011-03-06 21:05:30 PST (-0800)
Last modified: 2011-03-07 09:31:56 PST (-0800)
Viewed: 33 times, last viewed: 2017-06-08 16:01:08 PDT (-0700)
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