Search on : Taxa descriptions

 


   
Description type:Original description 
Description:Pileus 10–50 mm diam., convex when young, then plano-convex and depressed or infundibuliform with inflexed margin, the margin remaining smooth or becoming faintly crenate; surface in young specimens dry and velutinous, dark greyish brown or almost blackish brown (7E3, 7F3–4; BFF 33), in mature and older specimens the blackish brown velvety hairs visibly more dispersed and revealing the paler, brownish grey and slightly shiny surface (BFF 32), resulting in a minutely punctate aspect of the expanding pileus, the central area remaining velutinous and darker. Stipe 6–35 — 3–8 mm, cylindrical and tapering downwards, with central or slightly eccentric attachment to pileus; surface velutinous and almost smooth when young, mature specimens with fine, blackish and longitudinally stretched wrinkles on a brownish and somewhat silvery grey and slightly shiny surface. Lamellae adnate or subdecurrent, moderately dense, rather narrow (1–3 mm) and thin, yellowish cream-coloured (4A2–3(4)); edge smooth and concolorous with the lamella surface. Context firm, solid in pileus and stipe, in young specimens within several minutes staining completely orange-pink (like smoked salmon) (6AB3–6); colour reaction fainter and in patches in older specimens; smell unremarkable; taste faint. Latex scarce, white, staining context orange-pink; taste unremarkable or somewhat acrid. Spore print not observed.
Basidiospores 5.8–7.4 — (5.4) 5.5–6.9 µm, Q = 1.02–1.14, on average 6.6 — 6.1–6.2 µm, Q = 1.06–1.10 (n = 40), subglobose; ornamentation zebroid and winged, the ridges 2µm high or slightly higher, firm and thick
with rather blunt edges, often with some long ridges parallel arranged, sometimes branching, and intermixed with shorter ridges; minute, isolated warts present on spore surface; plage not or faintly amyloid. Basidia 35–70 — 10–17 µm, clavate or subclavate, mostly rather stout, 4-spored, occasionally 1-spored basidia observed, often with guttulate contents; sterigmata 2–5 — 1–2 µm. Macrocystidia absent. Pleuropseudocystidia 4–12 µm diam., scarce, not or hardly emergent, narrowly clavate, clavate or clavate with a finger-like projection, often with crystalline contents. Lamellar edge sterile and composed completely of cheiloleptocystidia, 20–50 — 4–7 µm, slender, subfusiform or narrowly sublageniform. Lamellar trama rather thin, mainly filamentous but with inflated hyphal elements present; lactifers scarce to moderately abundant. Pileipellis a trichoderm, 100–150 µm thick, with broad or slightly inflated hyphal elements, 5–15 µm diam., upper layers containing brown, intracellular, diffuse pigmentation; terminal elements subcylindrical, recumbant, erect or somewhat repent; cell walls mostly thin, sometimes refringent. Stipitipellis a trichoderm, 30–60 µm thick, hyphal elements 2–8 µm diam., upper layers containing brown, intracellular, diffuse pigmentation, terminal elements subcylindrical, repent or oblique, sometimes upright, 4–8 µm diam., thin-walled or slightly refringent.
Habitat: lowland, dipterocarp rain forest.
Known distribution: Peninsular Malaysia.
 
Taxon name: