Search on : Taxa descriptions


 Add this item to the list  POLYPORUS HEMICAPNODES Berk. & Br.
Description type:Non-original description 
Jour. Linn. Soc. 14:47, 1873 (K:). - Polyporus pusillus Rostr. Bot. Tidsskr. 24:359, 1902 (C;).
FRUITBODY annual, growing solitarily, pileate, laterally to centrally stipitate, 1-10 cm wide and 1-8 mm thick. PILEUS circular to flabelliform or almost spathulate, infundibuliform or centrally depressed towards the stipe in laterally attached specimens, upper surface pale luteous, pale leather-coloured to very pale umber at the centre, even or with finely radiate streaks or lines or weakly zonate, when dry, strongly enrolled along the margin which has no cilia. STIPE up to 5 cm long and 1-10 mm thick, centrally to laterally attached, dark brown, velvety when young, more blackish and glabrous when older wrinkled longitudinally when dry, usually sharply limited towards the pore layer and the pileus in laterally attached specimens. PORE SURFACE decurrent on the stipe, cream to tan, up to 3 mm thick, pores small and round, (4)5-8 per mm, dissepiments thin and entire. CONTEXT up to 1 mm thick, pale luteous to corkcoloured.
HYPHAL SYSTEM dimitic, generative hyphae hyaline, thinwalled and clamped, 3.5-5 µm in diameter, binding hyphae 3.5-5 µm wide, lgmen narrow, scanty to strongly branched with tapering ends. The tomentum on the stipe consists of cylindrical golden to brown hyphae with occasional clamps and few branches up to 7 µm wide. CYSTIDIA none. SPORES broadly cylindrical to slightly elliptical, hyaline, smooth and thin-walled,i7-10 x 3.5 -5 µm.
HABITAT. On deciduous wood. DISTRIBUTION. Known from the Indo-Pacific area, in Africa known from Uganda and Kenya. It is apparently rare, but it is usually very small and easily overlooked.
REMARKS. The species is very variable with regard to size, but the pale tan to leather-coloured, smooth, often infundibuliform pileus and the small pores are good field characteristics. It is undoubtedly related to P. leprieuri from the neotropics. Besides their geographic separation, the spores of P. hemicapnodes are larger and wider.
P. melanopus of the temperate zone is very similar in general appearance except for the pileus which is much darker in P. melanopus starting with pale chestnut-brown and becoming purplish-black with age. Superficially P. hemicapnodes may also remind of P. varius as they more or less have the same colour, on the pileus. However, in P. varius the stipe is black and smooth, while it is velutinate, dark brown and wrinkled in P. hemicapnodes. Besides, the latter has wider spores.
Taxon name: