Checklist of the British & Irish Basidiomycota

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Scytinostroma portentosum (Berk. & M.A. Curtis) Donk, Fungus, Wageningen 26: 20 (1956)

Corticium portentosum Berk. & M.A. Curtis, Grevillea 2(no. 13): 3 (1873)
Stereum portentosum (Berk. & M.A. Curtis) Höhn. & Litsch., Sber. Akad. Wiss. Wien Math.-naturw. Kl., Abt. 1 116: 743 (1907) [1906]
Scytinostroma hemidichophyticum Pouzar, Česká Mykol. 20: 217 (1966)

Habitat: On decorticated wood, or on bark, usually on the undersides of large logs or fallen trunks of deciduous trees. Most frequently collected on Fraxinus and also known on Fagus and Salix spp.

Notes: First reported from England (West Kent: Lullingstone Park) in 1991 but apparently spreading and now known from Berkshire, North Hampshire, Surrey and West Norfolk, with a single record from Scotland (South Aberdeen) in 2001. Basidiomes have a pungent odour of naphthalene.

Distribution: E: !, S: !

Vouchers: England: K(M) 35834; Scotland: K(M) 84147

Descriptions, Lists & Icons:
D+I:, in Breitenbach, J., Kränzlin, F., Fungi of Switzerland Non gilled fungi, Heterobasidiomycetes, Aphyllophorales, Gasteromycetes 2: 412 pp. (1986), p. 116, pl. 100
D:, in Hansen, I. & Knudsen, H., Nordic Macromycetes Heterobasidioid, Aphyllophoroid and Gasteromycetoid Basidiomycetes, (Ed.: Lise Hansen & Henning Knudsen) 3: 444 pp. (1997), p. 320
D+I: Profiles of Fungi - 77 Scytinostroma portentosum, in Legon, N.W. & Pegler, D.N., Mycologist 10(2): 49-96 (1996), p. 84
D+I:, in Hallenberg, N., The Lachnocladiaceae and Coniophoraceae of North Europe: 1-96 (1985), p. 33-37, pl. Figs 22-24

Conservation Status: Rare (Red Data List, Ing 1992); removed from list (Red Data List, Evans et al. 2006)

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