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 Add this item to the list  813241 Original description
Description type:Original description 
Description:Diagnosis: Differs from C. eucalyptorum in its more bright yellow color of the hymenophore, particularly when young, and its closer genetic relationship to C. densifolius.
Cap mostly 25-45(−60) mm diam., regular or with uneven, waving or undulating lobes, when young with strongly incurved margin becoming even or uplifted when old with a sunken center to strongly infundibiliformous; surface when young mostly entirely cottony-tomentose to pubescent, with age usually disrupting in larger, appressed and concentrically arranged squamules, when wet smooth and sometimes almost velvety, colours varying from coffee-with-milk or the colour of milk chocolate, to more reddish or grayish hazelnut or cinnamon brown (5C3-4, 5B3, 4B2-3). Hymenophore decurrent, of well-developed, gill folds, 2-4(6) mm high, quite thin and often fissured over their entire height, a bright chrome to yellowish orange when young (more intensely yellow than 2- 3A7), forkings not abundant and mostly close to the cap margin, varying from completely smooth to heavily anastomosed in between gills. Stipe mostly and sometimes distinctly shorter than the cap diam., more rarely quite slender and exceeding the cap diam., 8–17 mm diam., up to 30 (04) mm long, subcylindrical or slightly narrowing downwards, mostly white, but sometimes also tinged with chrome yellow or a diluted yellowish to cream over part or all of its surface, except for the extreme base which remains generally pure white, often developing similar squamae as the cap, but lower and solid. Flesh firm and thick beneath the cap center, white but yellowing near the surface or when handled. Taste mild. Smell faint and untypical. Spore print distinctly yellowish.
Spores ellipsoid, reniform to almost oblong or even cylindrical, l(7.3)8-8.31-8.7 × (4.2)4.5-4.90-5.3(5.4) μm, Q = (1.3)1.5-1.71-1.9(2.1), smooth, filled with one large, oily inclusion. Basidia 50-60(65) × 7–9 μm, subcylindrical to weakly clavulate, (4)5-6-spored and with 5–8 μm long sterig- mata (longer for 2–3 spored basidia and also rather frequently deformed); basidiola not particularly irregular in form. Subhymenium filamentous, with cells of similar diam. as the basidium base. Cystidia none, however some specimens are completely sterile forming aborted basidia, resembling very irregular, cystidia-like cells in the hymenium. Pileipellis a loose (tricho)cutis of ramifying, thick-walled hyphal extremities, densely septate with up to 10 consecutive cells, sparsely branching, measuring mostly 4-6(9) μm diam. toward the cap margin often somewhat wider, terminal cells generally subcylindrical and regular, sometimes locally inflated or subapically constricted; pigment inclusions very apparent inside cells, strongly refringent. Clamp connections absent from all tissues.
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