POLYPOREAE OF SOUTH AFRICA. 271 



0-3 mm. long; mouths subrotund to angular, 2 to 3 to the mm.; 

 edges thick, entire, stone colour (greyish fawn); spores hyaline, 

 smooth, 3/x to 4jj, by 4ju. to 7/a. 



Distribution. — Common on logs around Durban, collected by 

 the writer. 



Recognised by its extreme thinness and umber brown, zoned, 

 velvety surface. 



The plant is described as "subflabelliform" but all the speci- 

 mens seen by the writer have been largely resupinate, but in spite 

 of this different habit they ere referred here. Even in the 

 resupinate region the fungus is frequently not attached to the 

 substratum by its entire under surface, but by "nodular" swellings 

 which arise at irregular intervals. 



P. caperatus, Berk., is close to the above but thicker, and this 

 appears to be the main and only distinction between the two. 



46. Polyporus flexilis, sp. n. 



Plants eff used-reflexed ; pileus coriaceous, imbricate, tough, at 

 times conchate, laterally extended, connate, 1 cm. to 7 cm. by 

 1 cm. to 1-5 cm. bv 0-1 cm. to 0-5 cm.; surface with a brown 

 velvety to hirsute pubescence, azonate ; margin thin, acute, often 

 turned upwards; context soft and spongy to corky, 1 mm. to 4 mm., 

 umber brown, shining, fibrous; tubes 0-3 mm. to 1 mm. long, con- 

 colorous with context, elongated on effused portion; mouths sub- 

 rotund to elongated or angular, 2 to 3 to the mm. ; edges entire, 

 thin, brown; hyphae simple 4/x to 5ju,. 



Distribution. — Found at Pietermaritzburg, Natal, on log, by 

 the writer. 



The plant is related to Polystictus zelanicus, and differs from 

 Trametes protea, Berk., in colour of context. (Type in Natal 

 Herbarium, P v. d. B., No. 810.) 



47. Polyporus snbpictilis, P. Henn. 

 Polystictus subj/icti/is, P. Heim. 



Pileus sessile, thin, coriaceous, attenuated at back, applanate, 

 flabelliform, 2 cm. to 4 cm. by 3 cm. by 0-03 cm. to 0-2 cm. ; surface 

 hard, brown, with raised concentric zones; margin thin, undulate 

 crenate; context yellowish brown 0-25 mm. to 0-5 mm., fibrous, 

 tough; tubes 0-25 mm. to 15 mm. long; mouths 3 to 4 to the mm. 

 angular; edges thin, entire, dark brown; spores not found; hyphae 

 4/z, to 5/x diam. ; setae none. 



Distribution. — Found in Eastern Cape Forest Conservancy by 

 J. D. Keet, 



From P. anebus it differs in beins: thinner, flexible, and having 

 raised concentric zones. 



48. Polyporus snbradiatus, Lloyd. 



Pileus sessile, dimidiate, firm, decurrent behind, 1-3 cm. to 

 3 cm. by 1 cm. to 2 cm. by 0-3 cm.; surface inconspicuously zoned, 

 yellowish brown, smooth, velvety tomentose becoming glabrous, at 

 times dark brown and more or less regulose; context yellowish 



