Observation 86165: Nostoc commune
When: 2012-01-10
Who: zaca
No herbarium specimen

Notes: Growing on soil. The thallus was spread in pieces through the place. It didn´t present any apothecia and there were some impressive bubbles in all the pieces with empty interior (see the third photo attached).
I believe this specimens belong to one of the genera Collema and Leptogium and most probably to the latter. However, I was not able to get many information of species with such features. According to the description in CNALH in the genus Collema a candidate could be C. limosum, but the lack of apothecia makes the identification difficult. I was not able to find any clarifying photograph and, in fact, I saw just one photo, the one in CNALH. In the genus Leptogium I could not find any relevant information, beyond the existence of a species, L. adpressum, known as “skin lichen”.

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By: Jason Hollinger (jason)
2012-01-11 21:23:52 EST (-0500)

Even professional lichenologists sometimes have trouble distinguishing colonies of Nostoc from Collema, so you are in good company! I’d say this is Nostoc commune. (Incidentally the same thing used by Collema spp.!)

Created: 2012-01-11 20:07:28 EST (-0500)
Last modified: 2012-01-11 21:24:24 EST (-0500)
Viewed: 44 times, last viewed: 2016-10-23 20:15:56 EDT (-0400)
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