Observation 30655: Pleurotus ostreatus (Jacq.) P. Kumm.
When: 2009-12-20
No herbarium specimen

Notes: Oyster-shaped shelf fungus with cream-colored, decurrent gills, white spore print, and pleasantly sweet aroma. Only question mark is dark-brown pileus surface. Dense clusters growing on trunk and (presumably) from roots of a dying fruitless mulberry.

Proposed Names

-7% (3)
Recognized by sight: Doesn’t look like a regular oyster, And the growth habit is wrong. Calling it Fungi will get other people to look at it!
-4% (4)
Recognized by sight

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

Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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I have found many like this
By: Eddee (eddeeee)
2009-12-21 20:15:26 CST (-0500)

In the San Bernadino Mountains of S. Cali in the spring and early fall I have found pounds of Oyster mushrooms resembling your photo’s. Very brown caps.

Anyone ever seen
By: poxon (bpoxon)
2009-12-21 16:27:21 CST (-0500)

oysters with such a dark brown cap, though? In Humboldt, I’ve only ever seen the ultra-common white and slightly-grey capped varieties. These ones threw me a little. Like I said, I’ll grab a spore print and check it when I get back home to make the ID positive.

OK, you sure had a lotta photos, most of which I never looked at…;(
By: Debbie Viess (amanitarita)
2009-12-21 14:07:47 CST (-0500)

your thumbnail had purplish caps like a panus, but that may have been a lighting artifact.
I’m throwing my lot in with pleurotus…unless there is more than one species depicted in your photos.
BTW, googling the latin name will get ya lots of photos of Panus…try this link to Kuo’s site: http://www.mushroomexpert.com/panus_conchatus.html

If you ask me,
By: Irene Andersson (irenea)
2009-12-21 13:53:06 CST (-0500)

I’d say these are perfect oysters.

New pics added
By: poxon (bpoxon)
2009-12-21 13:29:22 CST (-0500)

Okay I got some new pics up. I looked into Panus conchatus… sounds like a possibility but could not find any pictures in books or on the web that matched what I’ve got here (and I seem to have left my microscope at home in Humboldt). I wish I had my dehydrator with me so I could preserve a specimen… I will try to get a solid spore print.

More pictures then?
By: poxon (bpoxon)
2009-12-21 11:31:21 CST (-0500)

It rained last night, so new pics will probably look slightly different, but I’ll try to get some better pics today. As for comment about growing habit, I would disagree that growing habit is not that of Pleurotus… main fruiting (surrounded by grass) is associated with a subsurface root, not just fruiting in the lawn. Fruitings this year differ slightly in that previous fruitings occurred mainly on trunk of tree. Interestingly, squirrels have made a habit of peeling the bark away to expose the mycelium, which they eat and then commence to get frisky…

Created: 2009-12-20 18:15:27 CST (-0500)
Last modified: 2009-12-20 18:15:27 CST (-0500)
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