Phylloporus purpurellus Singer, Beih. Sydowia 7: 100. 1973.
Pileus 2.6 cm broad, at first convex and subdepressed, with age convex and subdepressed, dry; disc even, at first dull purple, then gray; margin even, when young dull purple, then gray; surface velutinous, becoming wooly; maculose color spots absent; with NH4 blue. Flesh pale brown (pale purple under pileus cuticle); odor absent; taste mild; with NH4 blue. Hymenophore lamellate, decurrent. Lamellae subdistant, anastamosing (gradually and sparsely), forked (with many lamullulae), when young yellow, with age yellow. Stipe (1–)3 cm long, 4–4.5 mm wide, equal or tapering downwards; upper half when young floccose, pustulate, and punctate, with age floccose, pustulate, and punctate; lower half when young pustulate, punctate, and subglabrous, with age pustulate, punctate, and subglabrous. Stipe flesh above when young pale purple, with age pale purple, staining dark blue to red (former color immediately, then the latter); at base when young pale purple, with age pale purple, staining dark blue to red. Basal mycelium white.
Basidiospores olive brown, 7.5–11.3 µm long, 3.3–4 µm wide, smooth, fusoid, with KOH ochraceous to straw yellow to golden yellow (with age). Basidia 35 µm long, 7.5 µm wide, clavate, hyaline, 4 -sterigmate. Hymenial cystidia 48–65 µm long, 8.5–12 µm wide, more common towards the edge of lamellae, thin walled, hyaline, fusoid to ventricose or subcylindrical (rarely), encrusting pigment absent. Pileipellis hyphae a trichodermium; elements 4–10 µm wide, elongated or rounded or mucronate (towards terminal apical members), thin walled. Clamp connections absent.
Mycorrhizal host: Quercus.
The above description is dervied from the protologue. Currently this taxon is known only from the type collection found in an oak forest located between Cali and Popayan, Colombia.
Desc0016.
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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