PENIOPHORA 691 



thin walled, smooth, rarely slightly incrusted. Basal hyphae with 

 slightly thickened walls, 3-9 /i in diam., with rather few clamp con- 

 nections ; subhymenial hyphae 3-4 /j. in diam. Dead wood, and fallen 

 branches, especially of conifers. Jan. Dec. Not uncommon, (v.v.) 



2337. P. leprosa Bourd. & Galz. Trans. Brit. Myc. Soc. vi, text-figs, 

 p. 318. Leprosa, rough. 



R. 1-3 cm., white, then ochraceous, irregularly effused, crustaceous; 

 margin white, indeterminate, occasionally prolonged into white rhizo- 

 morphic strands. Hymenium pinkish ochraceous, somewhat cracked 

 when dry, rough with cystidia under a lens. Flesh somewhat thick, 

 fragile. Spores white, elliptical, 4-6 x 2-5-3 /A. Basidia inconspicuous, 

 about 4/i in diam. Cystidia very rough, cylindrical to subfusiform, 

 frequently occurring in clusters, so as to give an Odontia-like appear- 

 ance, occasionally branched near the apex, 60-90 x 8-14/7,. Basal 

 hyphae 3-4(-7)/u,, often strongly incrusted with crystals, clamp con- 

 nections rare. Dead bark. April. Rare. 



4. Receptacle membranaceous, fairly thick, easily separable when 

 fresh. Cystidia often little differentiated from the cystidioles 

 (sterile basidia) of Corticium, or scattered and unequally distributed. 



2338. P. cremea Bres. Bres. Fung. Trid. n, t. 73, fig. 2, as Corticium 

 (Peniophora) cremeum Bres. Cremea, cream colour. 



R. 2-6 cm., white, cream to ochraceous, broadly effused, separable; 

 margin white, arachnoid, then similar. Hymenium concolorous, smooth, 

 or here and there slightly tubercular, velvety, widely cracked when 

 dry. Flesh white, membranaceous, soft, thin. Spores white, oblong, 

 or cylindric ellipsoid, slightly curved, 4-8 x 2-4 jn; basidia 20-50 or 

 more x 7/u, with 2-4-sterigmata, 3-4 p long. Cystidia cylindrical, or 

 slightly elongated fusiform, tapering very gradually from the base to 

 the blunt apex, 70-120 x 5-9 fj,, very thin walled, smooth, or slightly 

 incrusted at the apex with easily detached crystals, usually projecting 

 up to 60 jj, ; sometimes thicker walled, embedded cystidia are present, 

 shorter than the projecting ones, fusiform, much incrusted, 40-60 x 

 9-10/i. Subhymenial hyphae loosely interwoven, much branched, 

 rather rigid, thick walled, constricted at the septa so as to appear 

 somewhat jointed, with no clamp connections, 5-6 fi in diam. Bark, 

 and fallen branches. Jan. Dec. Common, (v.v.) 



var. Alleseheri (Bres.) Wakef. Bres. Fung. Trid. n, t. 72, as Corticium 

 (Peniophora) Alleseheri Bres. A. Allescher. 



Differs from the type in its thicker subiculum, more sharply differen- 

 tiated from the hymenium, and containing numerous, short, rough, thick 

 walled cystidia. Bark. Jan. Dec. Not uncommon, (v.v.) 



442 



