Observation 63010: Hypotrachyna livida (Taylor) Hale
When: 2011-01-30
No herbarium specimen

Proposed Names

28% (2)
Eye3
Recognized by sight
56% (1)
Eyes3
Recognized by sight: see comments

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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Only a few choices…
By: Jason Hollinger (jason)
2011-02-02 15:40:41 CST (-0500)

Here’s how I read this:

1) pale gray (definitely not usnic, ruling out Flavoparmelia, Xanthoparmelia, etc.)
2) abundant pycnidia (ruling out isidiate/sorediate/pustulate species)
3) shiny cortex (makes it one of the parmelioids, not Physcia, etc.)
4) no white mottling or cracks in the surface (rules out Parmelia and Punctelia)
5) can’t tell if cilia are present or not, but certainly not long and conspicuous
6) too closely appressed for Parmotrema

In my keys this leaves only Hypotrachyna livida, Myelochroa galbina, and maybe Bulbothrix (is goebelii the fertile one?) I have a nice photo of the former two growing side by side (observation 47892). I’d say it looks a lot more like Hypotrachyna livida than Myelochroa galbina based on color, shape of lobe tips, thickness of apothecial rims, abundance of pycnidia. You could verify with chemistry. Also the medulla of Myelochroa is typically at least faintly yellowish even in the ones with supposedly white medulla.

Created: 2011-02-01 23:17:00 CST (-0500)
Last modified: 2011-02-02 15:43:36 CST (-0500)
Viewed: 17 times, last viewed: 2016-10-28 04:08:01 CDT (-0400)
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