Puccinia Gramineae. 125 



on Rhamnus cathartica, while the original name was retained for the rust 

 producing its aecidia on Rhamnus frangula. Nielsen had previously used 

 the name of P. lolii for Klebahn's species, and so it is retained on the score 

 of priority. 



(Plate II., Figs. 11, 14 ; Plate XXX., Fig. 261 ; Plate B., Figs. 5-8.) 



Phragmites. 



46. Puccinia magnusiana Koern. 



Koernicke, Hedw. XV., p. 179 (1876). 

 Sydow, Mon. Ured. I., p. 785 (1904). 

 Sacc. Syll. VII., p. 631 (1880). 



II. Uredosori on both surfaces of leaf, but mostly on upper, snuffy 



brown, erumpent, surrounded by ruptured epidermis, elliptic or 

 linear, confluent lengthwise and forming long streaks, with clavate 

 bright yellow paraphyses. 



Uredospores elliptic or obovate, golden yellow, echinulate, with 

 four equatorial germ-pores, 24-35 x 16-19/z; intermixed with 

 large numbers of clavate paraphyses, club thickened at apex, of a 

 dark smoky-brown and stalk hyaline, commonly 80-90 p long. 



III. Teleutosori minute, black, very numerous, scattered, elliptic or 

 linear, confluent into long black streaks on both surfaces of leaf, 

 but mostly on upper, occasionally paraphysate as in uredosori. 



Teleutospores clavate to oblong, dark chestnut-brown, generally 

 rounded and thickened at apex (up to 1 2 p}, sometimes bluntly 

 pointed, hardly constricted at septum, 35-55 X 14-21 ^w, average 

 38 X 18 IJL ; lower cell attenuated towards base; pedicels firm, 

 persistent, coloured yellowish, about length of spore or longer, 

 up to 70 ju. 



X. Mesospores similarly coloured to teleutospores, variable in shape, 

 somewhat ovoid to elongated, thickened at apex, 28-38 X 13-19 p. 

 On Phragmites communis Trin. 



Victoria Orbost, Aug., 1901 (Pescott). Flinders, Jan., 1902. 



Port Fairy, June-Aug., 1902 and 1905. Killara, March, 



1903. Bunyip, May, 1904. 

 South Australia The Grange, April, 1891 (Tepper). River 



Torrens, Adelaide, Apr., 1903 (Tepper). 

 Tasmania (Rodway ] ). 



The clavate paraphyses are usually described as hyaline, but Dr. Dietel 

 compared the Australian specimens with intense dark-brown paraphyses 

 with material from Europe, America, and the Cape of Good ^ Hope, and he 

 found that the latter were sometimes scarcely coloured, at otlier times light 

 or dark brown. 



The rust on Phragmites communis Trin., was considered as one species up 

 to 1876, viz., Puccinia phragmitis Schum. Then Koernicke separated it 

 into two, viz., P. phragmitis and P. magnusiana. The former was 

 characterized by the absence of paraphyses from the uredosori, the large 

 bullate teleutosori and the very long stalked markedly constricted teleuto- 

 spores, while the latter had numerous clavate paraphyses in the uredosori, 

 minute, punctiform or linear teleutosori, and shortly stalked, hardly 

 constricted teleutospores. The aecidia in the two cases likewise occurred 

 on different hosts. 



