When: 2007-03-06

Collection location: San Jose, California, USA [Click for map]

Who: Nathan Wilson (nathan)

No specimen available

Found growing on an old hay bale in my brother’s backyard. Apparently it had been fruiting for several days, but the fruiting bodies would generally be gone by mid-morning.

Identified as Coprinus fimetaris in Arora, but this is synonymized with Coprinopsis cinera according to the Index Fungorum.


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Definitely no fresh manure…
By: Nathan Wilson (nathan)
2012-06-18 19:36:04 CDT (-0500)

It was a suburban backyard so even the hay bale was unusual.

By: Europe-coprinologist
2012-04-15 23:43:12 CDT (-0500)


Coprinopsis cinerea, is always highly hydrated in manure is one of the first fungal degradation. If the media was only remains herbaceous, not think it’s C. cinerea .. It is a species close to this, Coprinopsis sec. lanatuli … I think C. jonessi.