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Page number:452 
Remarks (internal):The species is recognized by the rather small apically encrusted cystidia which, however, can be difficult to find in some specimens as they frequently are embedded and then appear slightly ventricose to bulbous, slightly thick-walled organs. If the cystidia are not found, the species is easily confused with Ceriporia xylostromatoides which, however, usually have smaller pores and more globose spores. 
Description type:Non-original description 
Description:OXYPORUS LATEMARGINATA (Dur. & Mont.) Donk.
Persoonia 4:342, 1966. - Polyporus latemarginatus Dur. & Mont. Syll. Crypt. . 163, 1856 (PC). - Poria ambigua Bres. Accad. Rov. Agiatti Atti 3,3:84, 1897 (S) - for several synonyms based on American specimens, see Lowe, 1966:17-18.
FRUITBODY annual, widely effused, up to 20 cm in diameter and 2-10 mm thick, fleshy to coriaceous, more fragile to rigid when dry. PORE SURFACE white to straw-coloured, after drying often with a brown tint or brownish patches, pores angular and irregular, usually 1-3 per mm, but occasionally larger or smaller, dissepiments often split or dentate up to several mm, tubes up to 10 mm long, and on the lower side of nodolose specimens up to 20 mm long, margin wide to narrow white to cream, occasionally matted and radially fibrillose. CONTEXT white to cream-coloured, soft fibrous when dry, up to 1 mm thick, continuing without change into the dissepiments.
HYPHAL SYSTEM monomitic, generative hyphae thin-walled to slightly thick-walled, hyaline to yellowish, branching almost at right angles, frequently simple septate, in the dissepiments strongly interwoven, 2-4(5) µm in diameter, in the context more slender and irregularly interwoven 3-6('7) µm wide. Pouzar notes that the hyphal walls are weakly amyloid, but this is not the case in our material from Africa. CYSTIDIA abundant to rare, thin-walled to slightly thickwalled, mostly ventricose apically coarsely encrusted, of about the same size as the basidia, embedded or slightly projecting, 13-30 x 4-7 µm. SPORES oblong ellipsoid, hyaline, thin-walled and smooth, 3.5-6 x 2.5-4 µm, nonamyloid.
HABITAT. On deciduous wood, but reported on coniferous wood in United States.
DISTRIBUTION. Cosmopolitan and widespread in the tropics and warmer parts of the temperate zones. In the East Africa found in Kenya, Tanzania and Uganda.
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