Small agaric, growing in litter or mulch or on wood, with a white spore print. Pileus pale, grey or black, not viscid. Stipe absent or apical (pseudostipe). Partial veil remnants absent. Spores hyaline, non-amyloid, smooth; germ pore absent. Cheilocystidia diverticulate or digitate. Lamellar trama regular or interwoven. Pileipellis a cutis or trichoderm, of branched or nodulose hyphae. Clamp connections present.

The grey colour of the lamellae separates this from other small, wood-inhabiting agarics without a stipe, such as Chaetocalathus or Cheimonophyllum (both with white or pale lamellae). Conchomyces can have grey lamellae, but it is larger, usually with a short lateral stipe and the spores are spinose. Some species of Pleurotus have grey lamellae, but the fruit-body is larger, with an excentric or lateral stipe, and spores are usually quite elongate.

Resupinatus (Nees) Gray, Nat. Arr. Brit. Pl. 1: 617 (1821).

Several species: Resupinatus cinerascens and R. subapplicatus, and also with records under the Northern Hemisphere species R. applicatus and R. striatulus. Within the genus, there are also several poroid species reported from Australia, including R. poriaeformis (= Stigmatolemma).

W.A., N.T., S.A., N.S.W., Vic. and Tas. (and probably also Qld).

In native forests.

On wood or woody debris.

Saprotrophic.

Bougher, N.L. (2009a), Fungi of the Perth region and beyond: a self-managed field book, Western Australian Naturalists' Club (Inc.), Perth. [Description and Illustration of R. cinerascens and R. subapplicatus]

Fuhrer, B. (2005), A Field Guide to Australian Fungi. Bloomings Books, Hawthorn. [Description and Illustration of R. applicatus and R. cinerascens]

Grgurinovic, C.A. (1997a), Larger Fungi of South Australia. The Botanic Gardens of Adelaide and State Herbarium and The Flora and Fauna of South Australia Handbooks Committee, Adelaide. [Description and Microcharacters of R. cinerascens and R. subapplicatus]

Griffiths, K. (1985), A Field Guide to the Larger Fungi of the Darling Scarp and South West of Western Australia. Published by the author. [Illustration of R. applicatus]

McCann, I.R. (2003), Australian Fungi Illustrated. Macdown Productions, Vermont. [Illustration of R. applicatus and an unnamed species]

Pegler, D.N. (1983c), Agaric flora of the Lesser Antilles, Kew Bull., Addit. Ser. 9: 1–668. [Description, B&W Illustration and Microcharacters of R. applicatus from the Lesser Antilles]

Thorn, R.G. & Barron, G.L. (1986), Nematoctonus and the tribe Resupinateae in Ontario, Canada, Mycotaxon 25: 321–453. [Description of the genus, and comprehensive information on four non-Australian species of Resupinatus including R. applicatus]