POLYPOREAE OF SOUTH AFRICA. 287 



This genus differs from Trametes only in the hymenial surface. 

 The pore walls is some of the Daedalia spp. are often as strongly 

 lamellate as in Lenzites. 



KEY TO THE SPECIES. 



Context brown. Vide Tr. moesta, p. 284. 



Context white or light coloured. 



Pileus corky to wood}-, surface velvety with a grey or 



brown tomentum. Vide Tr. obstinatus, p. 285. 



Pileus white, coriaceous to corky, finely tomentose, context 



shining and shade of colour varying with angle of 



light. D. Hobbsii 1 



1. Daedalia Hobbsii, n. sp. 



Plants annual, sessile; pileus dimidiate, coriaceous to corkv, 

 imbricate, laterally connate, decurrent at attachment, 5 cm. to 

 12 cm. by 4 cm. to 5 cm. by 0-5 cm. to 2 cm.; surface white, finely 

 tomentose to subglabrous, azonate, usually tuberculate, rarely 

 smooth; context 0-4 cm. to 1-4 cm. fibrous, tough, soft when fresh, 

 drying firm and corky, zoned, wood-coloured, shining, shade vary- 

 ing with angle of light; tubes 2 to 5 mm. long, elongated on 

 decurrent portion, white within; mouths poroid and subrotund to 

 elongated and daedaloid, 2 to 3 to the mm. measured transversely; 

 edges thick, entire white; spores hyaline, smooth, globose, 3/a to 4/a 

 diam.; hyphae simple 3/x to 5ja diam. 



Distribution. — Found at Howick, Natal, by G. Hobbs. (Type 

 in Natal Herbarium, No. 922.) 



The context has a satiny lustre when smoothly cut and the 

 shade of colour appears different according to the angle of the 

 light. 



Lenzites, Fries. 



Plants epixylous, annual, sessile (in L. repanda usually sub- 

 stipitate) or effused reflexed; pileus coriaceous to corky and firm 

 and rigid; context white or brown, coriaceous, corky, tough; 

 hymenophore typically lamellate, more rarely (e.g., L. trabea) 

 daedaloid or poroid; spores hyaline; crystida absent or present. 



KEY TO TEE SPECIES. 

 1. Context brown. L. trabea 1 



1. Context white. 



2. Surface and entire plant white, not tomentose. 



L. repanda 2 



2. Surface tomentose, greyish to brown or reddish brown. 



3. Surface velvety tomentose, closely zoned, usually grey- 



ish; edges of lamellae entire; margin thin. 



L. betulina 3 

 3. Surface velvety tomentose to rough, greyish brown to 

 reddish brown, edges of lamellae becoming much 

 dentate; margin thick. L. aspera 4 



