Observation 199488: Coprinopsis P. Karst.

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By: Byrain
2015-02-22 00:38:28 CST (-0500)

Distribution is rather wide with Coprinopsis marcescibilis and it has even been described from the states (Under several different names).

“Distribution: Austria, Czech Republic, Denmark, France, Finland, Germany, Italy, Norway, Slovac Republic, Spain, Sweden, Switzerland, USA

Coprinopsis marcescibilis obviously has a germ pore, its in my micrographs, in the C. marcescibilis illustrations, in the description and also present in all the related/synonymous taxa.

“germ pore large and truncat”

You do make a good point that this white species might be something else and that the spores may be too large or at least in the upper range. I’m not sure there has been much posted publicly of this species to confirm whether it is the same thing being called C. marcescibilis var. virginea in Europe other than that is looks really similar macroscopically. The normal form is almost certainly the same thing, at least some of them are.

The spores
By: Christian (Christian Schwarz)
2015-02-22 00:15:42 CST (-0500)

of this taxon are larger than what is recorded for Coprinopsis/Psathyrella marcescibilis in the references I have looked at.

My measurements from three different collections range 15×7 at the smallest to 18×8 at the largest. The germ pore tends to be huge – my measurements on at least two different collections note a germ pore up to 3 µm wide. I can’t find a mention of a germ pore being present at all for C. marcescibilis in my references.

Also, the colors appear not to be just a var. or forma. (I have never found fruitbodies with this shape, cap surface texture, and ecology that are not white). Moreover, the cap of C. marcescibilis is supposed to have floccose teeth at the margin, but be smooth elsewhere. These are quite silky-floccose over the entire cap when young and sometimes even in age.

Also, I think this thing is a native species. P. marcescibilis and its variants were I think all described from Europe quite a while ago.

Created: 2015-02-21 17:25:55 CST (-0500)
Last modified: 2015-02-22 00:38:49 CST (-0500)
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