Observation 280501: Lichen P. Micheli

Notes:
In shaded recesses of possibly calcareous rock, with moss.

Thallus seems to be small green imbricate squamulose areoles, with orange-brown biatorine apothecia.

Spores simple, narrowly ellipsoid, hyaline, with several oil drops? Average size 16.0×5.4µm (n=5).

Images

UV
Hypothecium

Proposed Names

28% (1)
Recognized by sight

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= Observer’s choice
= Current consensus

Comments

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I’ll take that good advice
By: J-Dar
2017-06-30 22:42:09 CDT (-0500)

and leave this one for now. It was very scant material, i was hoping with the apothecia color it might go to genus easy, but I too went to Lecanora and decided quickly not to go too far.

Tough one
By: Jason Hollinger (jason)
2017-06-30 22:34:19 CDT (-0500)

Might be a poorly-developed or aberrant Lecanora. If this were mine, before anything else, I would try to get an ascus stain. Also, I would verify for sure that all the spores are aseptate, either by clearing with a flame or in K or K/I. Some of the spores in the photo are definitely aseptate, but sometimes septae are very subtle in water and can be hard to spot.

But also, unless you have a good deal more material than what is shown here, you might be better off limiting your expenditure on this one! Definitely something worth looking for next time you’re out.

A little help?
By: J-Dar
2017-06-30 22:02:43 CDT (-0500)

Maybe I’m tired, but I got nowhere with this one.

Created: 2017-06-30 22:00:49 CDT (-0500)
Last modified: 2017-06-30 22:00:56 CDT (-0500)
Viewed: 25 times, last viewed: 2019-08-20 06:16:48 CDT (-0500)
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