Search on : Taxa descriptions

 


 
 Add this item to the list  824980 Original description
   
Description type:Original description 
Description:Basidiocarps small to medium-sized. Pileus 11–54 mm in diam., first subglobose to hemispheric, plano-convex when mature, sometimes depressed at center, slightly striate about 3–5 mm from the edge inwards when old, rarely cracked, slightly viscid when wet, sometimes glabrous, peeling 1/5–1/3 from the edge, often vinaceous brown tinged, hazel (XIV11′k), liver brown (XIV7′m) to vinaceous russet (XXVIII7′′) at the edge, a paler tinge of avellaneous (XL17′′′b), fawn color (XL13′′′) to olive buff (XL21′′′d) towards the center. Lamellae adnate, 2–4 mm in height, 11–16 per cm at the edge, not forked, often interveined, first pale yellowish tinges of martius yellow (III23f), turning Apricot Yellow (XL21′′′d) to Light Cadmium (IV19) when mature, Orange-Citrine (IV19k) to Medal Bronze (III19m) when old and dry, lamellulae absent. Stipes central to subcentral, 4.2–6.5 × 0.9–1.6 cm, subcylindrical to cylindrical, surface dry, rugulose longitudinally, dull, without annulus, slightly attenuate upwards, White (LIII), a brown tinge of Tawny (XV13′i) when bruised and dry, stuffed at first, becoming hollow when old. Context up to 1–3 mm at the center of the pileus, White (LIII), unchanging, slowly turning greyish brown tinges of Sudan Brown (III15k), Ochraceous-Tawny (XV15′i) to Buckthorn Brown (XV17′i) when bruised, fragile; odour not distinct; taste mild. Spore print Yellow (Romagnesi IV b–c).
Basidiospores [100/2/2] 7.7–9.6 (–10.1) × 6.4–8 (–8.6) μm, Q = 1.06–1.33 (–1.38) (Q = 1.19 ± 0.07), subglobose to broadly ellipsoid, rarely globose to ellipsoid, verrucose; ornamentation amyloid, composed of verrucous to conical warts 0.7–1 μm in height, mostly linked by fine lines as ridges, reticulate, rarely isolated, forming an incomplete to complete reticulum; suprahilar area amyloid and distinct. Basidia 34–42 × 8–11 μm, clavate, ventricose towards upper half, four-spored, projecting 15–25 μm beyond hymenium, hyaline in KOH; sterigmata 4–6 μm, pointed, straight to slightly tortuous. Pleurocystidia scattered, 47–72 × 6–7 μm, originating from subhymenium, projecting 20–35 μm beyond hymenium, thin-walled, subfusiform to subclavate, sometimes clavate or fusiform, apex obtuse to round, at times subacute, contents crystal, blackish grey in SV. Cheilocystidia not observed; lamellar edge sterile. Subhymenium 20–50 μm thick, composed of slender cylindrical cells 4–10 μm wide under basidia and inflated elliptical to globose cells 15–25 μm in diam. next to trama. Pileipellis 150–270 μm thick, composed of an epipellis (60–90 μm thick) and a subpellis (90–230 μm thick); epipellis a cutis or trichoderm, composed of mostly ascending to repent hyphae, intermixed with a few suberect elements, 2–4 μm in diam.; pileocystidia abundant, 37–55 × 3–5 μm, cylindrical to subcylindrical, with round to obtuse tips, multi-septate, contents dense, black in SV; subpellis composed of long, rarely septate, equally wide hyphae 2–4 μm in diam. interweaved with sphaerocytes 15–30 μm in diam. Stipitipellis a cutis composed of thin-walled, septate, cylindrical, hyaline to slightly yellowish hyphae 3–5 μm wide; terminal cells of stipitipellis hyphae with obtuse apex; caulocystidia not observed. Trama composed of sphaerocystes 15–60 μm in diam. and septate filamentous hyphae. Clamp connections and lacticiferous hyphae absent in all tissues
 
Taxon name: