Phylloporus bellus (Mass.) Corner, Nova Hedwiga 20: 798. 1970.
Pileus 1–3.3(–6) cm broad, at first convex, with age plane or depressed or concave (eventually), dry, entire; at first dark brown to yellow orange, then dark brown to yellow orange; surface subtomentose to subvelutinous, becoming granular-fibrillose or subsquamulose or scaly; maculose color spots absent; with NH4 blue to purple (sometimes fading to latter color). Flesh white to pale yellow (with age), staining absent or blue. Hymenophore lamellate, decurrent. Lamellae subclose to distant, ventricose (slightly, not always), not anastamosing and not poroid, somewhat intervenose, a few forked or simple (rarely), tridymous to tetradymous, when young sulphur to primrose yellow, with age sulphur to primrose yellow, staining absent or blue to green (slightly). Stipe 1–4.4 cm long, 1.3–7.5(–9.5) mm wide, mostly equal or subequal or clavate (occasionally), not radicating, dry; upper half when young glabrous to subglabrous, yellow to light cinnamon, with age finely pustulate (at the apex for a very short distance longitudinally brown or yellow ribbed but just as often quite smooth and only innately fibrillose); lower half when young subglabrous to glabrous, sordid yellow to light cinnamon (eventually often concolorous with the pileus), with age finely pustulate; base white. Stipe interior solid; flesh above when young white to whitish yellow or pale cinnamon, with age white to whitish yellow or pale cinnamon, staining not present or blue; flesh at base when young white to whitish yellow or pale cinnamon, with age white to whitish yellow or pale cinnamon, staining not present or blue. Basal mycelium white.
Basidiospores olive, (8–)9–10(–12.5) µm long, (2.7–)3.5–4.5(–5.5) µm wide, mean Q = 2–3.3, smooth, subfusoid to fusoid, inamyloid, with KOH golden yellow to light brown melleous. Basidia 29–38 µm long, 6.5–10 µm wide, clavate, hyaline, 4 -sterigmate. Hymenial cystidia 32–81 µm long, 7.5–18 µm wide, numerous on sides and edges of lamellae, thin walled, ampullaceous or clavate-ventricose to ventricose to utriform to obtuse to mucronate, encrusting pigment sometimes present. Hymenophoral trama hyphae bilateral (phylloporoid), inamyloid. Pileipellis hyphae a trichodermium or forming a palisade, in KOH pale yellow; elongated or short (eg. 11–16 x 10 µm, but mostly 20–28 x 6–7 µm), smooth, thin walled, not gelatinized. Stipitipellis hyphae vertically oriented, parallel, giving rise to subhymeniformly arranged dermatocystidia, 30–55(–87) µm long, 5–20 µm wide, with incrusting pigment present (in older carpophores the dermatcystidia and the underlying subparallel hyphae of the cortex of the stipe partly melleous granular incrusted). Clamp connections absent.
Mycorrhizal host: Quercus and Castanopsis (the former in Costa Rica).
First described from Singapore, Singer & Gómez (1984) cite collections from Japan, Mexico and Costa Rica. The diagnostic features are the white basal mycelium, cyanescent lamellae, and thin walled nonincrusted hymenial cystidia.
Desc0010.
Cite this publication as: Halling, R. E., G. M. Mueller, and M. J. Dallwitz. 1998 onwards. Leccinum and Phylloporus in Costa Rica: Descriptions, Illustrations, Identification, and Information Retrieval. Version: 13 Decmber 2006. http://www.nybg.org/bsci/res/hall/deltaindex.html. Dallwitz (1980) and Dallwitz, Paine and Zurcher (1993 onwards, 1998) should also be cited (see References).
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