Melanoleuca graminicola

General: Small stature agaric with a convex to flattened umbonate pileus 2-3 cm diam., dark brown, lamellae adnate to short-decurrent with a tooth, stipe with pinkish tints and white longitudinal fibrils, cystidia absent, odor of Pelargonium, taste mild and indistinct.

Pileipellis: Cutis of cylindrical hyphae 4-7 µm wide, branched, with brown intracellular pigment, septate with clamp connections.

Lamellar edge: Fertile, lacking differentiated cystidia.

Lamellar trama: Regular.

Basidia: Clavate, 23-35 x 7-9 µm, base simple (clampless), 4-spored.

Spores: Ellipsoid, hyaline, thin-walled and verrucose, 6.5-8 x 4.5-6 µm, with a small eccentric apiculus, containing a large oil guttule, amyloid in Melzer's reagent.

Herbarium voucher: JTP2670/25.