Uromyces Leguminosae. 97 



Cooke and Massee mistook the uredospores for teleutospores, but the 

 existence of several gerin-pores, together with their general appearance, 

 indicate their true nature. Spermogonia were present in this material. 



Finally Dr. Cobb, 10 in 1897, described the uredo stage of Afelampsora 

 phyllodiorum, and gives a drawing of the uredospores with an average size of 

 41 x 17 fi. He also found the perithecia of Darluca filum Cast., among 

 the sori, but their true nature was not recognised. 



(Plate XXV., Figs. 218-228.) 



Trifolium. 



18. Uromyces trifolii (Alb. and Schw.) Winter. 



Winter, Die Pilze, I., p. 159 (1884). 

 Cooke, Handb. Austr. Fung., p. 330 (1892). 

 Sacc. Syll. VII., p. 534 (1888). 



0. Spermogonia honey-coloured, disposed in small clusters. 



Spermatia hyaline, globose, about 3 p, diam. 



1. Aecidia in circular clusters, on pallid spots ; pseudoperidia cup- 



shaped, with a white laciniate margin. 



Aecidiospores subglobose, ellipsoid or irregular, very finely 

 verrucose, pale orange, 14-23 ^ diam., or 22-25 x 14-16 yu. 



II. Uredosori rounded or elliptic, scattered, surrounded by the 



torn epidermis, ruddy brown. 



Uredospores irregularly globose or shortly elliptic, echinulate, 

 golden-brown, with two equatorial germ-pores on one face, 22-26 

 x 18-20/i. 



III. Teleutosori smaller and rounded on the leaves, larger and elon- 

 gated on the petioles, dark brown, almost black, bullate, long 

 covered bv the leaden epidermis. 



Teleutospores generally intermixed with uredospores, ellipsoid, 

 globose or pear-shaped, thickened at the apex with a small pale 

 wart, smooth, dark-brown, 22-30 X 19--22 p, average 24 X 20 yu; 

 pedicels long, hyaline, deciduous. 



On leaves, petioles and stems of Trifolium repens L. 



Victoria Near Melbourne, Apr., I., II., III. Sep., I., III. Bunyip, 

 Nov., I., II. Nyora, Apr., L, II., III. Murramurrangbong 

 Ranges, Jan., L, II., III. 



New South Wales (Cobb 12 ). 

 Tasmania (Rod way 1 ). 



All the stages were found together in January and April, and occurred 

 on petiole, leaf, and stalk of inflorescence. The uredospores and teleutospores 

 were very common, but the aecidiospores were not so common, and they were 

 found also on the calyces. The leaf stalk was often much swollen and dis- 

 torted. The spermogonia usually precede the aecidia. The teleutospores 

 are considered to germinate only after a period of rest, but they were ob- 

 served in April, to germinate freely while on the leaf. 



The mycelium may be perennial, and Dietel z considers this a common 

 occurrence. 



(Plate XVIL, Fig. 142; Plate G., Fig. 32.) 



