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 Add this item to the list   818643 Original description
   
Description type:Original description 
Description:Basidiomata up to 68–75 mm. in height. Pileus 70–84 mm. in diam., initially convex then planoconvex to applanate with a broad but shallow depression at center on maturity; margin decurved to plane, entire, somewhat striate to sulcate; surface dry, viscid when moist, glossy, coarsely wrinkled (rugose), rimose when mature, apricot-colored, yellowish orange (4A7) or orange yellow (4A7–8, 4B7–8) to orange (5A6–5A7), reddish orange (7A6–7A8) to yellowish white (2A2) spots found over the center and around depression, turning bright yellow (2A7–2A8) with KOH and reddish brown (8D6–8D8) with guaiacol; pileus context chalky white (1A1–2A1), hard, compact, up to 9 mm thick, thining towards the margin, unchanging when bruished but turning reddish brown (8D6–8D8) with guaiacol. Lamellae adnexed to free, close to rather crowded (9–11/cm), up to 5 mm broad, forked near the stipe apex, middle of the cap and near the cap margin also, yellowish white (2A2), entire, with concolorous edges, unchanging when bruised but turning orange (6A6–6A7) to reddish brown (8D6–8D8) with guaiacol; lamellulae present at least 3 lengths. Stipe 50–55 × 14–20 mm, cylindrical to subclavate, tapered towards the base, dry, smooth, brittle, central, chalky white (1A1–2A1); stipe context hard, solid, compact, chalky white (1A1–2A1), unchanging when bruised but turning reddish brown (8D6–8D8) with guaiacol. Taste somewhat bitterish. Spore print pale cream. Basidiospores 7–7.43–8 × 6–6.46–7.4 µm (n=30, Q= 1–1.15–1.33), subglobose to broadly ellipsoid, rarely ellipsoid, ornamentation amyloid, composed of long and short spines (up to 1.2 µm high), mostly aligned or connected to form partial to incomplete reticulum, apiculi up to 2 µm high. Basidia 37–60 × 11–16 µm, cylindrical ,subclavate to clavate, 4-spored, sterigmata up to 10 µm high. Subhymenium layer up to 20 µm thick, pseudoparenchymatous. Pleurocystidia 60–112 × 10–13 µm, cylindrical, fusiform to lanceolate with mucronate, appendiculate, rounded, pointed apex or ventricose rostrate, emergent up to 60 µm, content dense. Gill edges fertile, with basidia and cystidia. Cheilocystidia 37–94 × 7–12 µm, cylindrical, subclavate to fusiform with rounded apex. Pileipellis up to 100 µm thick, a trichoderm, composed of branched, septate, suberect to erect hair like hyphae (2–5 µm wide) with blunt apex, some encrusted; pileocystidia 4–6 µm broad, cylindrical with rounded or acute apex. Stipitipellis a trichoderm, composed of branched, septate hyphae (2–4 µm wide); some hyphae encrusted. Caulocystidia up to 6 µm broad with mostly rounded apex 
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