Collection location: Clinton, Whidbey Island, Island Co., Washington, USA [Click for map]
Found in mature mixed coniferous second growth forest of Douglas Fir, Western Red Cedar, Western Hemlock.
Pileus is about 3 to 5cm and has fine radial striations and a distinct darker bump in the center top. Color is sort of mocha.
The silvery stipe is slender and about 9cm long with a sturdy ring that looks like it turns upward and may have two distinct ridges. Gills are not attached to the stipe and there was no discoloration when broken. I detected no distinguishing odor.
I’m thinking it is some sort of Lepiota, but can’t find a match.
Thanks for the comments.
Psathyrella longistriata sounds like a good match. Dare I nail it down, or just leave it at Psathyrella?
Looking at the gills, they look too dark to be Lepiota, which will be white or white with few brown/grey stains. Here the gills are grey, at least in the photo. Did you get a spreo print? The color on the stipe looks grey, so it might be a black spore color? But I’m not sure. But the cap looks hygrophanous, and thin, and fragile, with a black spore print this points toward Psathyrella sp. But I certainly don’t know much about those, and I’ve never seen one with a well developed annulus (partial veil on the stipe) like that. But like I said, that doesn’t mean much, don’t know enough about Psathyrella. But they shouldn’t have free gills…
Pretty guys, with free gills and dark spores, that kinda points toward Agaricus. Which does has a strong annulus, but usually isn’t that thin or fragile (or hygrophanous…).