A small white to cream fan- or shell-shaped fungus from the Russian Far East with a radially folded, almost wrinkled spore-bearing underside instead of gills. It is the only species of Stalpersia and is known only from the collections Parmasto described from the Sikhote-Alin Nature Reserve in Primorye. Its spores are spiny and strongly amyloid, and its placement in Auriscalpiaceae rests on its morphological resemblance to Lentinellus.
Never eat a wild mushroom based on a web page — confirm with an expert.
Mycology is an evolving science: names, classifications and safety information change as research advances. Entries are compiled from cited sources and reviewed, but may be incomplete or out of date — check the sources, and never rely on this library alone to identify or eat a mushroom.
Habitat
Holotype on the litter layer of a fir (Abies) forest; a second collection on rotten wood in a riverside (alluvial) forest. Parmasto suggested it may be mycorrhizal and able to develop in the litter layer; its ecology is unconfirmed.
Distribution
Russian Far East: known only from the Sikhote-Alin Nature Reserve area, Primorye.
Characteristics
Fruit body: irregular fan-shaped, semicircular or round caps 2-5 cm wide, sometimes dimidiate or on a short stalk (up to 2 cm long, 5-10 mm wide) bearing one to three caps; white to cream when fresh, drying slightly yellowish and almost horny. Surface: uneven, smooth to slightly floccose, without a true cap skin; margin slightly toothed or lobed. Flesh: watery-soft to nearly cartilaginous; odour faintly of flour or none. Hymenophore: radially striate-folded to almost merulioid, white to cream; no true gills. Hyphae: monomitic; generative hyphae thin-walled, clamped, 3.5-6 µm wide; gloeoplerous hyphae 4-6 µm wide with yellowish granular contents. Gloeocystidia: in the trama 40-90 x 8-12 µm; in the hymenium blunt, clavate, 30-50 x 8-12 µm. Basidia: slightly utriform, 4-spored, 35-40 x 6-8(-10) µm, sterigmata 4-6 µm. Spores: broadly ellipsoid to almost teardrop-shaped, slightly thick-walled, 5.5-6.8 x 4.0-4.8(-5) µm (Q 1.36-1.4), with conical amyloid spines 0.5-1 µm high and a large apiculus; strongly amyloid. Spore print: white.
