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Page number:321 
Description type:Non-original description 
Description:Cyphellostereum laeve (Fr.) Reid, Beih. Nova Hedw. 18 p. 336, 1965; Cantharellus laevis Fr., Syst. mycol. 1 p. 324, 1821; Cyphella laevis (Fr.) Lund. in Lund. & Nannf., Fungi exs. suec. n. 2058, fasc. 41-42, 1953.
Fruitbody pileate, small (ab. 0,5-1 cm in diam.), rounded or spathulate, usually tapering to a short, often indistinct stipe; upperside flat or somewhat convex, white, composed of interwoven hyphae in a soft texture, without differentiated surface layer; hymenial side concave, white or cream-coloured, smooth or almost so, continuous; margin somewhat inflexed.
Hyphal system monomitic; hyphae hyaline, slightly cyanophilous, narrow, ab. 2,5 µm wide (2-3 µm), even, sparsely branched, without clamps; distinct subhymenium formed by densely interwoven hyphae.
Cystidia numerous, projecting, thinwalled, not encrusted, narrowly fusiform, widest near the base, apically rounded to a insignificantly widened head, 35-55x 6-7 µm.
Basidia clavate, with small drops in the protoplasm, 15-18 x 4,5-6 µm, with 4 ster. and without basal clamp.
Spores subglobose or subellipsoid, tapering towards apiculus, thinwalled, somewhat cyanophilous, with one oildrop, 4-4,5 x 2-2,5 µm.
Habitat. On living mosses, esp. on Polytrichum sp. (e.g. P. commune, formosum).
Distribution. Little known species. According to Lundell (l.c.) it should be fairly common in Femsjö in SmÀ¥land, but in our opinion it is a rare species. There are some scattered collections in Sweden, from Femsjö to UmeÀ¥ (G. Eriksson 1970-09-01). It is reported from Finland by Karsten (as Stereophyllum boreale Karst., Medd. Soc. Fauna Fl. fenn. 16 p. 104, 1889).
 
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