Observation 95427: Pleurotus ostreatus (Jacq.) P. Kumm.

When: 2012-05-19

Collection location: St. Paul, Minnesota, USA [Click for map]

Who: Gene Kremer (GeneMN)

Specimen available

found two very nice oysters on elm stumps which might have been Pleurotus elongatipes, (aka Hypsizygus tessulatus) but turned out to have a lilac spore print suggesting P. ostreatus; H. tessulatus is buff colored. As both are usually fruiting late summer to fall here, I’m wondering if the stress of losing their host might speed that up? Anyway, they were delicious. Saved a sample and spore print. When I get to the micro part of the project, the spore size should nail it down (elongatipes a third of the size of ostreatus).

Please login to propose your own names and vote on existing names.

Eye3 = Observer’s choice
Eyes3 = Current consensus


Add Comment
H. tessulatus
By: walt sturgeon (Mycowalt)
2012-05-24 18:25:32 PDT (-0700)

does not have decurrent gills. As for spore color for P.pulmonarius Kuo states:
Spore Print: Whitish, grayish or lilac.

Wrong spore print color for pulmonarius
By: Gene Kremer (GeneMN)
2012-05-24 17:30:06 PDT (-0700)

Created: 2012-05-24 15:57:07 PDT (-0700)
Last modified: 2014-12-11 20:56:08 PST (-0800)
Viewed: 196 times, last viewed: 2017-06-12 22:53:32 PDT (-0700)
Show Log