Observation 18915: Crepidotus (Fr.) Staude
When: 2009-02-25
Herbarium specimen reported

Notes: This soft, fragile, small, gilled shelf was quite common here. It is somewhat velvety on top with white-fuzzy point of attachment. Gills are brownish. I failed to get a spore print off of it before it dried out, but I think I see rusty-brown spores on the gill face at 20×.

(number 0226.5, page 177)

Proposed Names

31% (2)
Eye3
Recognized by sight
53% (3)
Eyes3
Recognized by sight: Appears to have brown spores

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Eye3 = Observer’s choice
Eyes3 = Current consensus

Comments

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That’s right
By: Marcelo (venom2283)
2009-09-09 18:49:34 SAST (+0200)

You’re absolutely right, there are species with cystidia, a little confusion on my part. What if it is safe in Panus are very large, up to 100 microns and Crepidotus never that big and there is no doubt the difference in the hyphal system. Thank you very much for the comment.

Um, cystidia?
By: Douglas Smith (douglas)
2009-09-09 18:37:34 SAST (+0200)

Um, Crepidotus has plenty of cystidia, I’m pretty sure pretty much every species has cystidia, and there is quite a bit of taxonomic significance to the cystidia shapes in Creps, also in spore shapes. There are only a few species in Crepidotus that have pleurocystidia, though… but still a few have this.

Also a number of species in Crepidotus have a “pseudostipe”, a kinda small sidewise stipe, and even in those species this can come and go, so it isn’t a common thing, that you can use for id. But it is there sometimes in some species.

Some differences betwen Panus and Crepidotus
By: Marcelo (venom2283)
2009-09-09 18:24:57 SAST (+0200)

Panus have a spore print white and Crepidotus have a spore print brown, yellowish brown. Panus has a stipe more developed while in Crepidotus this is absent o almost absent. Because of the stipe almost absent in your specimen I prefer Crepidotus but this is confirmed by a microscopic study. Microscopically Panus presents Cystidia and spores hyaline and thin walled and Dimitic hyphal system. Crepidotus does not have cystidia, the spores are brown or yellowish and a monomitic hyphal system.

Created: 2009-02-27 21:11:48 SAST (+0200)
Last modified: 2009-02-27 21:11:48 SAST (+0200)
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