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Page number:26 
Description type:Non-original description 
Description:Poria tropicalis (Cooke) Rick Fig. 11 Iheringia (Bot.) 7:272. 1960. Fomes tropicalis Cooke, Grevillea 15:22. 1886 (isotype-BPI).
Perennial, probably becoming widely effused, up to 3 cm thick, adnate; margin blackish-brown, indurated, wide; pore surface glaucous-gray, dull, the tubes appearing very pale chocolate brown, when dry subwoody, up to about 5 mm long in each indistinct layer, old tubes becoming whitestuffed, pores round, 5-9 per mm, edges thick, entire; context brownish, firm, apparently lacking or at most very thin, continuing unchanged into the trama.
Tissue unchanged in color in KOH; hyphal system dimitic, the context principally of skeletal hyphae which are rarely branched, thick-walled to more commonly solid, nonseptate, 2-4 (-5) µm in diameter, and of rare generative hyphae which are simple-septate and 2.5-4 µm in diameter; trama continuous with the context and of similar hyphae; hymenium 10-12 µm. thick; cystidia abundant, incrusted, clavate, 17-40 x 12-24 µm; basidia clavate, 10-12 x 3.5-4 µm; spores hyaline, smooth, IKI blue, oblong-ellipsoid, 3-4 x 1.5-2 µm.
On unknown substrata in Guatemala, Nicaragua, Jamaica, and described from British Guiana; associated rot unknown. P. albostygia is perhaps most similar but differs in having context hyphae 5-7 µm in diameter and spores 4-6 x 4-4.5 µm. Fomes lividus resembles this externally but differs internally in lacking cystidia.
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