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Cystoderma

Field characters

Pileus: convex, the Pileipellis is easily removed by rubbing, forming layer on the fingers (Largent and Thiers, 1977)
Annulus: usually present (in our species) and quite distinct, flaring and of a very different texture than the stipe.
Stipe: Usually distinctly pallid above the annulus
Stature: Armillarioid
Ecology: often in moss, on the ground, rarely on wood

Micro characters

Basidiospores: small, smooth, amyloid or inamyloid. ellipsoid to subglobose.
Hyphae: with clamp connections, inamyloid
Cystidia: usually present
Spore Print: white
Lamellae: adnexed, adnate to subdecurrent
Lamellar Trama: regular
Pileipellis: with "bran-like to micaceous-like squamules" (Largent and Thiers, 1977)

Notes

Once you see the distinctive annulus (see photograph) you won’t forget this mushroom, and the Pileipellis is very distinctive (see photos).

To date we have only encountered C. granosum in the Berkshires. There are about 20 species in North America.

KOH is used in the taxonomy of this genus. A small amount applied to the cap will yield reactions in some species.