The Families of Mushrooms and Toadstools Represented in the British Isles


L. Watson and M. J. Dallwitz


~ Hyphodermataceae.

Morphology. The fruit-bodies producing basidia and basidiospores; attached laterally and bracket-shaped (e.g., the often moss-covered Oxyporus populinus), or flattened and more or less appressed to the substrate or encrusting, with the hymenium on the outside (sometimes resupinate, as in Schizopora paradoxa); medium sized to very large; in the few species illustrated, 3–30 cm across; with flesh not beef-steak like (i.e., unlike that of Fistulina). The hymenium porose (sometimes unambguously so, as in Oxyporus populinus with its minute pores, but sometimes ostensibly pegged, spinose or smooth by disintegration of a hymenium initially with wide pores having toothed orifaces, as in Schizopora paradoxa). Cystidia present. The basidia ‘unmodified’; not of the ceratobasidialean type (q.v.). The basidiospores hyaline, or white, or yellow-brown, or olive, or brown; usually smooth; amyloid (rarely), or inamyloid.

The hyphae without clamp connections. The hyphal walls lamellate, with a thin, electron-dense outer layer and a relatively thick, electron-transparent inner layer. The hyphae monomitic, or dimitic.

Chemical reactions. The context hyphae not xanthochroic.

Ecology. Parasitic, or saprophytic, or parasitic and saprophytic (?); on vascular plants. The fruit-bodies on dead wood and on living wood (on living and decaying trees and shrubs?). Found in broad-leaved woodland, in mixed woodland, and in coniferous woodland (?).

British representation. 33 species in Britain; Basidioradulum, Hyphodontia, Oxyporus, Schizopora.

World representation. 84 species; genera 8. “Widespread”.

Classification. Basidiomycota; Basidiomycetes; Agaricomycetidae; Hymenochaetales.

Illustrations. • Oxyporus populinus and Schizopora paradoxa (LH).

To view the illustrations with captions giving names in current use, go to the interactive key. This also offers full and partial descriptions, diagnostic descriptions, differences and similarities between taxa, lists of taxa exhibiting or lacking specified attributes, distributions of character states within any set of taxa, source references, and other relevant material.

Cite this publication as: ‘Watson, L., and Dallwitz, M.J. 2008 onwards. The families of mushrooms and toadstools represented in the British Isles. Version: 6th March 2015.’.