Checklist of the British & Irish Basidiomycota

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Melanotus horizontalis (Bull.) P.D. Orton, Notes R. bot. Gdn Edinb. 41(3): 595 (1984)

Agaricus horizontalis Bull., Herb. Fr. (Paris) 7: tab. 324 (1788) [1787-88]
Agaricus hepatochrous Berk., Hooker's J. Bot. Kew Gard. Misc. 7: 574 (1848)
Naucoria horizontalis (Bull.) Sacc., Syll. fung. (Abellini) 5: 833 (1887)
Phaeomarasmius horizontalis (Bull.) Kühner, Le Genere Galera: 33 (1935)
Melanotus proteus (Kalchbr.) Singer, Lloydia 9: 130 (1946)
Melanotus hepatochrous (Berk.) Singer, Sydowia 5: 472 (1951)
Melanotus textilis Redhead & Kroeger, Mycologia 76(5): 868 (1984)
Psilocybe horizontalis (Bull.) Vellinga & Noordel., Persoonia 16(1): 128 (1995)

Habitat: On decayed (and usually decorticated) wood of deciduous trees and conifers, often growing on the cut faces of stacked trunks and logs, in woodland and plantations. Also known on discarded and decayed rope, carpets, matting, worked wood etc.

Notes: Occasional but widespread. Often split into several taxa on the basis of preferred substrata but specimens fall within the variation of a single species. Cultural studies (Sime & Petersen, 1999) have established the synonymy of several species considered distinct in BFF5.

Distribution: E: o, S: o, W: !

Vouchers: England: K(M) 30369; Scotland: K(M) 24300; Wales: K(M) 28020

Descriptions, Lists & Icons:
D:, in Watling, R. & Gregory, N.M., British Fungus Flora. Agarics and Boleti: 5 Strophariaceae & Coprinaceae p.p.: Hypholoma, Melanotus, Psilocybe, Stropharia, Lacrymaria & Panaeolus 5: 121 pp. (1987), p. 27-28

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