Observation 163576: Psathyrella (Fr.) Quél.

Substrate: on wood; growing out of the base of a large, old Populus trichocarpa (Black Cottonwood), from under bark. (The tree is estimated to be more than 260 years old, and is purportedly the largest Populus trichocarpa in the United States. See 3rd photo.)
Stem: fibrous; width 3-5 mm; length 2-4 cm
Spore print: dark brown to blackish


knife is 8 cm long

Proposed Names

-92% (2)
Used references
63% (3)
Recognized by sight
-55% (3)
Recognized by sight

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= Observer’s choice
= Current consensus


Add Comment
Could be
By: walt sturgeon (Mycowalt)
2014-04-18 11:30:09 CDT (-0400)

Something close to Psathyrella cotonea.

dark spores
By: Joseph D. Cohen (Joe Cohen)
2014-04-18 11:10:40 CDT (-0400)

Now have spore print, so I added spore color and a fe other details not visible from photos.

Created: 2014-04-17 20:41:14 CDT (-0400)
Last modified: 2014-04-18 18:51:57 CDT (-0400)
Viewed: 68 times, last viewed: 2019-07-12 10:16:29 CDT (-0400)
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