Horak, E. 1980: Xeromphalina and Heimiomyces in Indomalaya and Autralasia. Sydowia 32: 131-153.
Details
Taxonomic concepts
Descriptions
Pileus-20 mm, convex when young soon becoming plane or depressed, centre flat to subumbonate; dark red-brown with conspicuous yellow felty or velvety tomentum; dry, velvety to hairy, sometimes with low radially arranged veins at disc, membranous, tough, margin not striate. Lamellae (L 10-18, -3) crowded, broadly adnate to emarginate (decurrent with short tooth), ventricose; pale yellow turning yellow-brown, edge albofimbriate. Stipe-35 x -3 mm, cylindric or gradually enlarged into pileus, central; yellow-brown, with obvious orange tomentum over entire length; dry, entirely velvety to hairy, pruinose in upper portion, hollow, tough, single and cespitose, in groups. Context dark brown, gelatinous. Odour and taste acidulous or not distinctive. Spore print white.
Spores 7-10 x 4 -5 µm, elliptic, sometimes subcylindric to suballantoid, smooth, hyaline, amyloid, germ pore none. Basidia 25-40 x 5-7 µm, 4-spored. Cheilocystidia-60 x-6 µm, conspicuously branched, with irregular, numerous rod-like projections, membranes thick-walled, hyaline or yellow-brown. Pleurocystidia none. Caulocystidia like cheilocystidia but larger, membrane brown (KOH). Cuticle a palisade of erect, fasciculate, cylindric or subfusoid terminal cells (pilocystidia), membranes thick-walled, apex rounded, rarely with antler-like projections, intermixed with clavate to subovate thick-walled, strongly refractive cells. Structure of subcutis like H. neovelutinus (HONGO). Clamp connections numerous.
Pileus-50 mm, convex, plane or concave with broad obtuse umbo, campanulate; yellow-brown at disc, yellow towards strongly striate margin; dry, smooth to granulose becoming minutely velvety, strongly hygrophanous. Lamellae (L 8-10, -3) rather distant emarginate, subdecurrent with tooth, ventricose, up to 10 mm wide, often intervenose; yellow, with reddish brown tint in mature specimens, edge concolorous, even. Stipe -40 x-4 mm, cylindric, equal, central; yellow-brown; dry, entirely pruinose to velvety, hollow, tough, veil remnants absent, single in groups. Context gelatinous. Odour and taste acidulous. Spore print white.
Spores 7-8 (9) x 3.5-4 (5) µm, elliptic, smooth, hyaline, amyloid, thin-walled. Basidia 25-35 x 5-6 µm, 4-spored. Cheilocystidia 25 – 40 x 3-6 µm, branched with irregular, rod-like projections, membranes hyaline, thick-walled. Pleurocystidia none. Caulocystidia irregularly branched near tips, membranes thick walled, yellow-brown or rust brown (KOH). Cuticle a trichoderm or palisade of fasciculate, projecting, cylindric or clavate terminal cells (pilocystidia), apically with short antler-like projections, membranes thick-walled, hyaline to rust brown, sometimes with yellow-brown plasmatic pigment; intermixed with ovoid to polymorphous cells with thick-walled and strongly refractive walls. Subcutis divided into 2 well defined layers: a) strongly gelatinised, hyaline, entangled hyphae (1-3 µm diam.)-below epicutis; b) irregularly arranged, cylindric, often branched hyphae (up to 20 diam.) with thick-walled, strongly refractive, gelatinised membranes. Clamp connections present.
Cited scientific names
- Crinipellis velutipes G. Stev. 1964
- Heimiomyces atrofulvus (G. Stev.) E. Horak 1971
- Heimiomyces neovelutipes (Hongo) E. Horak 1980 [1979]
- Xeromphalina leonina (Massee) E. Horak 1980 [1979]
- Xeromphalina podocarpi E. Horak 1980 [1979]
- Xeromphalina racemosa G. Stev. & G.M. Taylor 1964
- Xeromphalina testacea E. Horak 1980 [1979]