The cap has the margin incurved, the gills have a tooth (sinuate), and are adnexed to the stem.
In the genus Collybia the annulus and volva are both wanting, the spores are white, the gills are free or notched, or sinuate.
sinuate: cut into sinuses; applied to lines and margins with an in and out curve.
Valve linear or oblong, sometimes with sinuate sides, and with a pseudoraphe and transverse punctate lines.
Gills adnate or sinuate; spores brownish purple, sometimes intense purple, almost black.
Valve very convex, with sinuate keel and junction lines evident.
In summer it may be known at once by the oval, sinuate leaves with blunt lobes.
sinuate, said of the gills when they are notched at their junction with the stem.
Plants large, subglobose, with alveolate, sinuate carbonous exterior.
sinuate, with the sinuses cut out into smaller irregular notches as if gnawed.