Holotype (PDD 2701 8); Isotype (Herb. HK. ZT 68/629): 'S of Lake Waikareiti, Urewera N.P., N.Z.; leg. Horak, 30.VI.1968'.

Pileus 40-70 mm diam., conical or convex with prominent umbo, margin undulating, dark brown, dry, radially fibrillose, striate near the margin, hygrophanous. Lamellae adnexed, deep waxy-yellow when young, becoming dark pink, gill edge concolorous, serrate, crowded. Stipe 50-80 x 7-12 mm, cylindrical or attenuated towards the apex, deep yellow or coloured like brass, in aged carpophores yellowish-brownish, dry, innately fibrillose, with white weft at the base, hollow, fragile, twisted. Context yellowish-brownish. Odor acidulous. Taste mild.
Spores 6-7 x 5.5-7 µm, subglobose, 6-7-sided. Basidia 35-45 x 8-1O µm, 4-spored (rarely 2-spored). Cystidia none. Cuticle a cutis of cylindrical hyphae (6-12 µm diam.), membrane thin-walled, not gelatinized, with brown pigment dissolved in the plasma or located in the vacuoles. Clamp connections absent.

On soil among mosses and litter in Nothofagus spp. forests (with Phyllocladus alpinus, Dracophyllum spp., etc.). New Zealand.

Pileo 40-70 mm lato, conico vel convexo-umbonato, brunneo, radialiter innato-fibrilloso, sicco, hygrophano, marginem versus striato. Lamellis adnexis, cerino-luteis dein intense roseis, acie concolori serratoque instructis. Stipite 50~80 x 7-12 mm, cylindraceo vel attenuato apicem versus, cerino-luteo vel aureo, aetate brunneo-luteo, sicco, longitudinaliter fibrilloso, cavo, fragili. Odore acidulo. Sapore miti. Sporis 57 x 5.5-7µm, subglobosis. Basidiis 4-sporigeris. Cystidiis nullis. Epicute ex hyphis cylindraceis cutem formantibus, pigmento brunneo plasmatico vel vacuolato instructis. Hyphis defibulatis. Ad terram in silvis nothofagineis. Novazelandia.

E. cerinum is not related to any of the other known species of Entoloma in New Zealand. It has only some characters in common with E. luteifolium Hesler from Cuba but the two fungi are definitely different.

Holotypus (PDD 27018): 'Lake Waikareiti, Urewera N.P., N.Z; leg. Horak, 30.VI.1968'.