CEYLON FUNGI. 5 



217.— Polyporus russoceps B. & Br. 



In Bull. Soc. Myc. France, XXX., p. 36, Patouillard has 

 called attention to the fact that the pores of Polyporus rus- 

 soceps bear cystidia, which are covered with short spines. 

 He notes that solitary cystidia are rare, and irregularly 

 distributed over the hymenium, but that the walls of the 

 tubes bear minute tufts of cystidia, 30-60 \). in diameter. 

 The upper surface of the pileus is covered by a loose villous 

 layer, in which larger, more spiny cystidia occur, but there 

 are none on the edges of the dissepiments. 



In the type specimens the tubes are somewhat lax, and 

 often radially elongated, and, in drying under pressure, they 

 have separated from one another here and there. The 

 specimens give the impression that the hymenium is soft 

 when fresh. In a specimen recently collected the pore surface 

 is rigid and the pores regular, while the edges of the pores are 

 densely covered with cystidia, and the walls of the tubes bear 

 the same cystidia for a short distance from the mouth. 



218.— Poria interrupta B. & Br. 



In Fungi of Ceylon, No. 508, Berkeley and Broome described 

 Polyporus interrupius B. & Br., from Thwaites 652 in part ; 

 in No. 497, they enumerated Polyporus vaporarius Fr. 

 (Thwaites 367, 369), and in No. 498, Polyporus vulgaris Fr. 

 (Thwaites 367, 369 in part). 



In "A Preliminary List of Ceylon Polypori," Ann. Perad., 

 VI., pp. 87-144, the writer stated that Polyporus interrupius 

 and the specimens assigned to Polyporus vulgaris were the 

 same species, while the specimen assigned to Polyporus 

 vaporarius were re-named Poria aquosa. 



A further study of these species has convinced me that it is 

 not possible to keep Poria aquosa distinct from Polyporus 

 interrupius. The form named P. inferruptus is that which 

 grows on decajang branches at some height, 20 feet or more, 

 above the ground. At that height it forms small cushions 

 with a tomentose margin, and when these cushions coalesce, 

 the continuous sheet is interrupted by bands or areas on which 

 the pores are not yet developed. When this form is collected 

 on fallen branches it is usually dry, and the dissepiments are 



