POLYPOREAE OF SOUTH AFRICA. 289 



and Acacia mollissima in Eastern Cape Forest Conservancy; T. J. 

 van de Merwe, on live Celtis kraussiana in Eastern Cape Forest 

 Conservancy; J. D. Keet, on Pinus sp. and dead logs at Knysna, 

 Cape; the writer at Nottingham Road, Natal Province; frequent 

 on Acacia mollissima logs in plantations in Natal. 



Lenzites flaccida, Fries., is taken to be synonymous with the 

 above, and the same is the case with Lenzites quineensis, Fr. 

 According to type idea, L. betulina is thick and suberose and 

 L. flaccida thin and flaccid, but both are, I think, really one and 

 the same fungus. L. quineensis has firmer and more rigid lamellae 

 than L. betulina, and this appears to be the only difference. 



4. Lenzites aspera, Klotzsch. 



Plants annual, sessile, pileus dimidiate, applanate, conchate, 

 imbricate, coriaceous-corky, 7 cm. to 10 cm. by 3 cm. to 7 cm. by 

 0-2 cm. to 1 cm.; surface concentrically sulcate, covered with a 

 greyish brown to reddish-brown tomentum which varies from 

 velvety to rough; margin thick, rounded, buff -coloured, velvety; 

 context 1 mm. to 7 mm. thick, fibrous, corky, white, zoned, 

 hymenophore daedaloid to lamellate, lamellae 2 mm. to 6 mm. 

 creep, coriaceous, edges becoming much dentate; hyphae hyaline, 

 simple, 4/x to 7 /a diam. 



Distribution. — On Eucalyptus globulus at Elgin, Cape Pro- 

 vince. (Herb. Div. Bot., No. 7075.) Recognised by the greyish 

 to reddish-brown tomentum and dentate lamellae. The colour of 

 the surface is darker than in L. betulina and the pileus as a whole 

 thicker and firmer than in that species, from which it is also dis- 

 tinguished by the thick round margin and the dentate lamellae. 



Hexagona, Fries. 



Plants epixylous, sessile; pileus coriaceous to corky or hard 

 and woody; ungulate or applanate, in some very thin (e.g., 

 H. tenuis); surface azonate, zonate or sulcate, glabrous to veluti- 

 nate or setose; context corky to woody, rarely fleshy, usually 

 coloured, in a few white or pale, for example II. alb'ida; pores 

 usually large, subrotund to hexagonal. In //. tenuis and allied 

 species the pores are smaller than usual and shallow, in these small- 

 pored Hexagonas the pores are regular.* In some of the species 

 with white or pale context, daedaloid and lenzitoid forms occur 

 together with the normal hexagonal forms; setae absent or present, 

 coloured; spores hyaline. 



KEY TO THE SPECIES 

 1. Tubes shallow, mouths small, 0-5 mm. to 1 mm. diam. 



2. Context reddish-brown. II. tenuis 1 



2. Context light to fawn. H . rigida 2 

 1. Tubes deep, mouths large, 2 to 4 to the cm. 



3. Context reddish brown. 



4. Setae absent. H . speciosa 3 

 4. Setae present. II. pobeguini 4 



* The regular pores would distinguish these species from Polyporus 

 spp. (for example e.g. P. pinsitus) with shallow and as large pores, but 

 differing in that they are irregular. 



