The Families of Mushrooms and Toadstools Represented in the British Isles
Morphology. The fruit-bodies producing basidia and basidiospores; persistent; compound; the units of the compound basidiome fan-shaped (often laticiferous); small to very large; 2–40 cm across. The hymenium porose (tubulate). Cystidia absent. The basidia unmodified. The basidiospores ballistosporic, or statismosporic (or pale citrine); hyaline; ornamented (characteristically ridged); amyloid.
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 dimitic (with generative and skeletal hyphae). The generative hyphae not inflated.
Ecology. Parasitic and saprophytic; on vascular plants. The fruit-bodies on dead wood and on living wood. Associated with broad-leaved trees and with conifers. The fruit-bodies on trunks and branches of living trees, on dead trees and fallen logs, and on stored and construction timber. Mostly on Fagales and conifers, with H. annosum causing serious root rot in the latter. Found in broad-leaved woodland, in mixed woodland, and in coniferous woodland.
British representation. 1 species in Britain (H. annosum, = Fomes annosus); Heterobasidion.
World representation. 49 species; genera 8. Widespread.
Classification. Basidiomycota; Basidiomycetes; Agaricomycetidae; Russulales.
Illustrations. • Heterobasidion annosum (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. delta-intkey.com’.