278 POLYPOREAE OF SOUTH AFRICA. 



vaal (Herb. Div. Bot., Pretoria, No. 1724); W. Haygarth, in the 

 Ngoye Forest, Zululand ; Mrs. Reynolds, at Pietermaritzburg, 

 Natal; J. B. Leslie and the writer, around Durban, Natal. 



This is quite a common plant in South Africa. It is a larger, 

 thicker, and heavier plant than F. conchatus, and the surface 

 closely sulcate with small raised ridges. 



12. Forties yucatanensis (Murr.) Sacc. 



Pileus large, woody, perennial, sessile, dimidiate, applanate 

 or ungulate, 6 cm. to 40 cm. by 4 cm. to 14cm. by 5 cm. to 13 cm.; 

 surface at first velvety, yellowish-brown but later glabrous, dark- 

 brown to black and soon becoming very rimose ; context hard and 

 woody, 0-4 cm. to 0-8 cm., yellowish-brown; tubes stratified 1-5 mm. 

 to 3 mm. long each season, concolorous ; mouths circular 5 to 7 to 

 the mm.; edges entire yellowish-brown or darker, velvety to touch; 

 spores subglobose to globose, yellowish-brown, 3/x to 5/x; setae 

 present, dark-brown 17ju, to 28/x long, tapering to a point. 



Distribution. — Recorded in Eastern Cape Forest Conservancy 

 on live Olea sp. by .T. D. Keet; around Pretoria, Transvaal, by 

 A. Roberts on dead branch; on live Trema bracteolafa around 

 Durban, Natal, by the writer. 



Externally this plant is very similar to F. rimosus, from which 

 it is, however, distinguished by the presence of setae. From 

 F. rob ust us it differs in its smaller and coloured spores. 



13. Fomes oroflavus, Lloyd. 



Pileus perennial, sessile, applanate, 16 cm. by 10 cm. by 8 cm. ; 

 surface horny, encrusted, reddish, sulcate, conidial bearing; con- 

 text dark-brown, corky to somewhat hard, 4 mm. or more thick; 

 tubes 0-5 to 1 cm. long each season, brown, older becoming blocked 

 up with hyaline hyphae; mouths circular, 4 to the mm., edges 

 entire, bright yellow; spores yellowish-brown, truncate, obovate, 

 echinulate, 7-4ju, to 11/x by 7-4/a to 9ju, ; hyphae 3/x, to 5-3/u, diam. ;' 

 setae none. 



Distribution. — Recorded by P. J. Pienaar on Podocarpus 

 thunbergii at Knysna, Cape. (Herb. Div. Bot., Pretoria, No. 2338.) 



Except for the yellow pore mouths this plant is like Fomes 

 applanatus. So far I have only seen the above recorded specimen 

 and it is evidently not common. If it is merely a variation of 

 F. applanatus it would appear strange that it should not be more 

 common. 



14. Fomes applanatus (Pers) Wallr. 



Pileus frequently large, woody, perennial, applanate to ungu- 

 late, 10-5 cm. to 42 cm. by 10 cm. to 22 cm. by 2 cm. to 10 cm. ; 

 surface horny encrusted, greyish, reddish to drab-brown, sulcate, 

 at time tuberculate, opaque to subshining, conidial bearing; con- 

 text rusty to dark bay-brown, floccose, soft corky to hard, 0-5 cm. 

 to 3 cm. thick ; tubes in strata (the layers of successive years at 

 times separated by context tissue), 0-5 cm. to 2 cm. long each 

 season, dark-umber-brown, becoming stuffed with hyaline hyphae; 



