Coprinus americanus

Cortinarius husseyiKey to Gilled Mushrooms     Key
This is a key to gilled mushrooms, that is, mushrooms having a definite cap with a fertile surface consisting of gills. The fruiting body usually also has a stem, although that may be lateral or absent (usually, then, the mushroom is growing from wood). You can use this key to identify mushrooms that you find.

TricholomaAgaricales     Order
Fruiting body containing fibers (usually in the stalk)

Hypholoma capnoidesBlack Spored     Suborder
Spore print black, very dark brown, purplish black, or dark purplish brown, but not fitting the Gomphidiaceae
Gills usually light grey, becoming black from spores only when very mature

Coprinus cinereusCoprinus     Genus
All deliquescing fungi go here
All striate or pleated-capped non-Gomphidius black-spored mushrooms go here (but not randomly wrinkled ones: they go in Psathyrella)
When young, the cap usually cylindrical, and in any case much taller than it is wide and hugging the stem tightly; the gills at this stage are white, and packed very close together
Cap usually deliquescing and surviving in age as uplifted tatters or split fragments
Cap often covered with powder or tiny hairs, especially when young

Coprinus comatusLarge Shaggy Scaly Inky     Section
Cap up to 6" high; white, silvery, or some light greyish brown color; covered with fibrillose shags or scabby-looking white to brownish patches of universal veil material

Coprinus americanus     Patrick

Here are the characters that distinguish this species from the others in its group. For its more general characters, see higher up on the page.
If there's just a few words or a microscopic feature here, a more thorough description can be found above.


Microscropic Characters


This is a "nom. prov." in Nancy Smith Weber & A. H. Smith's (1985) A Field Guide to Southern Mushrooms. I don't know how well it has held up as a segregate from Coprinus variegatus), but it certainly fits (macroscopically) our local material. The spore size is the final arbiter of which "species" your collection belongs in