POLYPOREAE OF SOUTH AFRICA. 261 



Collections with the pores "trametoid" have also been found. 

 It is distinguished from P. versicolor by the hirsute surface and 

 the absence of multicoloured zones. Specimens of P. ochraceus 

 (Pers), Fr., and P. polyzonus, Ft., are referred here. 



17. Poly poms pubescens (Schuni), Fries. 



Plants annual, sessile; pileus applanate, dimidiate, leathery, 

 to corky, more firm when dry, 1-5 cm. to 6 cm. by 0-2 cm. to 4-5 

 cm. by 0.65 cm. to 0-9 cm., thickest behind, and slightly decurrent; 

 surface zoned, creamy white to greyish brown, villous-hirtose 

 tomentose; context 1 mm. to 6 mm. thick, white to yellowish, 

 zoned, fibrous, tough; tubes 1 mm. to 2 mm. long; mouths sub- 

 rotund, 2 to 3 to the mm. ; edges thick becoming thin and often 

 somewhat lacerate and denticulate; spores hyaline; hyphae 4/a to 



8/A. 



Distinguished from P. hirsutus by less hirsute surface and the 

 pore mouths becoming dentate. 



18. Polyporus hirtellus, Fries. 



Pileus sessile, or slightly decurrent at attachment, coriaceous, 

 laterally connate, 4 cm. to 5 cm. by 4 cm. to 6 cm. by 01 cm. to 

 0-4 cm.; surface at times sulcate, azonate or zoned, covered with a 

 soft cottony pubescence, white to greyish; margin thin, undulate; 

 context white, 0-5 mm to 1 mm. thick; tubes 1 mm. to 2 mm. 

 long; mouths subrotund when young becoming irregularly angular, 

 unequal, 1 to 3 to the mm.; edges thin, entire to denticulate, white 

 changing to yellow or dark brown. 



Distribution. — Found by T. R. Sim at Pietermaritzburg, Natal 

 Province (Herb. Div. Bot., 9141); G. Hobbs, at Howick, Natal. 

 The fungus is recognisable by the soft- cottony pubescence. 



19. Polyporus pinsitus, Fries. 



Pileus thin, flexible, largely resupinate, effused-reflexed later- 

 ally connate, 2 cm. to 4 cm. by 05 cm. to 1-5 cm. by 003 cm. to 

 0-2 cm. ; surface indistinctly zoned, white to creamy or ashy, velvety 

 villous; context white to yellowish, 1 mm. or less thick; tubes 

 short, less than 1 mm. long; white changing to yellow; mouths 

 irregularly angular to hexagonal, 2 to 3 to the mm. ; edges thin, 

 white when fresh, becoming discoloured yellow; spores hyaline, 

 smooth, oblong 5/x by 2/a to 3/m, ; hyphae 3/a to 6/i. 



Distribution . — Found on dead wood around Durban by the 

 writer. 



This fungus is recognised by its thin flexible pileus and shallow 

 angular pores. The margin of the pileus is usually thin, undulate, 

 and incurved on drying. 



20. Polyporus durbanensis, sp. n. 



Plants annual, sessile or effused reflexed ; pileus dimidiate, 

 imbricate, applanate to conchate, laterally connate, 1 cm. to 3 cm. 

 by 0-5 cm. to 2-5 cm. by 01 cm. to 0-3 cm., coriaceous, tough, becom- 



