T y O Puccinia Onagraceae, Rosaceae. 



ONAGRACEAE. 



Epilobium. 



100. Puccinia epilobii-tetragoni (DC.) Wint. 



Winter, Pilze, p. 214 (1884). 



Sydow, Mon. Ured. I., p. 424, (1902). 



Sacc. Syll. VIL, p. 608 (1888). 



I. Aecidia distributed over the entire surface of the leaf, scattered or 



crowded, hypophyllous ; pseudoperidia cup-shaped, with white, 

 laciniate, revolute margins. 



Aecidiospores orange yellow, polygonal, finely warted, 16-26 p. 

 diam., 18-21 p. being common. 



II. Uredosori chestnut-brown, scattered, or often orbicularly arranged, 



sometimes confluent, pulverulent, hypophyllous, soon naked. 



Uredospores ellipsoid or ovoid, clear brown, echinulate, with 

 two germ-pores on one face, 21-27 x 16-21 p, occasionally 

 reaching a length of 31 p. 



III. Teleutosori dark-brown, round, often arranged on ring-like spots, 

 hypophyllous, soon naked, pulverulent. 



Teleutospores intermixed with uredospores, elliptic or oblong, 

 yellowish-brown, slightly constricted at septum, smooth, 27-36 

 x 15-21 p, average 30 x 18 p; upper cell with a cap-like 

 thickening at apex (5-6 p) ; lower cell usually rounded at base 

 or sometimes slightly tapering ; pedicel hyaline, slender, deciduous, 

 short. 



X. Mesospores exceedingly rare, similarly coloured to teleutospores and 

 thickened at apex (5 p), subclavate to obovoid, smooth, 21-27 x 

 13-15 p, with hyaline pedicel. 



On leaves of Epttobium glabellum Forst. 



Victoria Dimboola, Dec., 1892, I., II., III. (Reader). Ardmona, 

 Arthur's Creek, Kergunyah, Nyora, Pakenham, <kc., Aug. 

 Dec., I., II., III. 

 On E. billardierianum Ser. 



Tasmania Great Lake, Feb., 1894 (Rodway l ). 

 On Epilobium sp. 



Tasmania Summit of Mt. Wellington, Jan. 1892, I. (Rodway). 

 Sydow, in his Monograph, distinguishes between P. epilobii DC., with 

 teleutospores alone, P epUobii-Jleischeri Fisch., with aecidia in addition to 

 teleutospores, and the present species with the three stages. 



(Plate X., Figs. 79, 80, 81.) 



ROSACEAE. 



101. Puccinia gei Me Alp. 



Geum. 



McAlpine, Agr. Gaz. N.S.W. VI., p. 756 (1895). 

 Sydow, Mon. Ured. I., p. 484 (1903). 

 Sacc. Syll. XIV., p. 297 (1899). 



III. Teleutosori hypophyllous, confluent, coffee-brown, on greenish- 

 yellow spots, which also occur on upper surface of leaf. 



