New Zealand: "Fjordland, East slopes of Mt Luxmore, Lake Te Anau; 26.iii.1969, leg. Horak PDD, 27122: holotype; ZT, 69/172: isotype)".

Pileus -30 mm diam., hemispherical becoming convex to umbonate expanded; brown at disc, yellow-brown towards the margin, in young carpophores margin densely covered with yellow strigose fibrils or hairs, later washed off; dry, fibrillose, estriate. Lamellae adnexed or emarginate-adnate, ventricose, crowded; light yellow turning yellow-brown; brownish fimbriate edges. Stipe 20-45 x 3-4 mm, cylindrical, equal; yellowish turning wax-yellow or yellowish brownish, with pink tints towards the base; upper half pruinate, with appressed white fibrils towards base; dry, solid, veil remnants absent, single or grown together. Context yellowish with greenish tints, white in base of stipe. Odour acidulous, like Lepiota cristata. Spores 6-7 x 4.5-5 µm, ovoid, smooth, brown. Basidia 18-26 x 7 µm, 4-spored. Cheilocystidia 15-35 x 10-18 µm, clavate to vesicular, thin-walled, hyaline, not encrusted. Pleurocystidia 35-50 x 13-8 µm, fusoid, thick-walled (-2 µm diam.), encrusted. Caulocystidia -100 x -12 µm, cylindrical to fusoid with a long neck, thin-walled, occasionally encrusted with crystals, hyaline. Cuticle a cutis of cylindrical hyphae (5-10 µm diam.), encrusted with yellow-brown pigment. Clamp connections numerous.

On soil under Nothofagus (N. cliffortioides, N. menziesii), Dacrydium, and Podocarpus. New Zealand.

Pileo -30 mm lato, ex hemisphaerico umbonato-convexo vel campanulato, brunneo, ad marginem fibrillis luteis strigosis instructo. Lamellis emarginato-adnexis, luteis dein luteo brunneis. Stipite -45 x -4 mm, cylindraceo, luteolo basim versus roseo tinctu, apicaliter pruinoso. Odore acidulo. Sporis 6-7 x 4.5-5 µm, ovoideis, levibus, Cystidiis dimorphis. Pleurocystidiis metuloideis, fusoideis, incrustatis. Habitatio ad terram in silvis nothofagineis. Nova Zeiandia.

Several characters are specific for I. cerea: they re the yellow colour of the fruiting bodies, in young specimens yellow strigose hairs along margins of the pileus, the vesiculose cheilocystidia, and the ovoid pores.