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 Add this item to the list  803282 Original description
Description type:Original description 
Description:Basidiomata very small, delicate. Pileus 1.5–4.5 mm diam., 0.75–1 mm high, conico-parabolic to hemispherical when young, becoming plano-convex with a centrally flattened depression; surface brown (5E4) or greyish brown (7E3) at the centre and marble white (5B2) or brownish grey (7D2) towards margin when young, becoming brown (5E4) or greyish brown (5D3, 7F3) at the centre and brownish grey (5C3, 7C2) towards margin with age, translucent-striate when young, becoming nearly sulcate towards margin, finely pruinose, dry; margin slightly incurved and entire when young, becoming straight and finely torn with age. Lamellae 13–19 reaching the stipe, free or attached to a slight collar, pale grey or off-white, 0.5–1 mm thick, subclose, with lamellulae of 2 lengths; edge finely torn under a lens, paler than the sides. Stipe 2–10.3 × 0.25–1 mm, central, terete, almost equal when young, becoming slightly tapering towards apex with age, hollow; surface translucent, greyish to white when young, becoming marble white (5B2) with age, finely pubescent all over when young, becoming glabrous towards apex, more or less densely pubescent towards base with age; base discoid, of radiating mycelium, hairy. Context not conspicuous. Odour and taste not distinctive. Basidiospores (6) 7–9 (10.5) × 4.5–6 (7.628±0.595 × 4.8625±0.29) μm, Q = 1.3–1.85, Qm = 1.57, ellipsoid, thin-walled, hyaline, smooth, strongly amyloid. Basidia (10) 14–20 × 8.5–11 μm, narrowly clavate, bearing 4 sterigmata up to 5.5 μm long. Lamella-edge sterile. Cheilocystidia crowded, 18–40 × 9–20 μm, fusoid or broadly fusoid or vesiculose, thin- to slightly thick-walled (0.5 μm), hyaline, often rostrate or with a very fragile, often curved, filamentous, rarely furcate protrusions (2–16 × 3–4 μm). Pleurocystidia none. Lamellar trama regular to subregular; hyphae 2–29 μm wide, thin-walled, hyaline to pale greyish, faintly vinoid to moderately vinoid in Melzer’s reagent. Subhymenium ramose. Pileus trama subregular; hyphae 3–34 μm wide, thin-walled, hyaline to pale greyish, faintly to moderately vinoid in Melzer’s reagent. Pileipellis an epicutis; hyphae 1.5–13 (20) μm wide, thin-walled, hyaline, with numerous lateral thorn-like protrusions (3-17 μm long), embedded in a gelatinous matrix, with prominent, loop-like clamp-connections. Pileocystidia 34.5–78 × 11–34.5 μm, clavate to narrowly clavate or obovoid, thin-walled, hyaline, with simple, cylindrical excrescences (0.5–6.5 × 0.5–1.5 μm). Terminal cells at pileus margin 16–51.5 × 12–26.5 μm, clavate or ellipsoid or fusoid, thin-walled, hyaline, with simple, cylindrical excrescences (0.5–2.5 × 0.5–1 μm). Stipitipellis a cutis of smooth hyphae; hyphae 1.5–8 μm wide, thin- to very slightly thick-walled (0.25 μm), hyaline. Caulocystidia (16) 27–146 × 7–23 (27) μm, ellipsoid, oblong or cylindrical or narrowly fusoid or lageniform, thin-walled, hyaline, pedicellate or not, occasionally mucronate or with an apical protrusion (4–10 × 1–2 μm). Stipe trama strongly vinoid in Melzer’s reagent. Clamp connections seen on all hyphae. 
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