Hctcruroviyces. i '• '> 



jv-) 



Uroviyces jiinci, Tul. Cooke, "Grevillea," vol. vii. p. 139; 

 '•Micro. Fungi," 4th edit., p. 213. 



Exsiccati. 



Vize, "Micro. Fungi Brit.," 445. 



^cidiospores on Lnila dysenterua, May to July. 

 Teleutospores on /uncus obtusiflorus, July to October, and 

 lasting through the winter on the dead stems. 



Biology. — The presence of the mycelium of the nscidiospores in 

 the leaves causes round spots, which are yellowish in colour, and 

 surrounded by a purple line. Fuckel suggested the probability of the 

 connection between the aecidiospores and the teleutospores, but I 

 believe the actual demonstration of their relationship by culture was 

 never made until I did so in 1882. 



Uromyces pisi. (Pers.) 



^cidiospores — Scattered over the whole leaf surface. Pseudope- 

 ridia cup-shaped, with whitish edges. Spores subglobose or 

 polygonal, orange, finely verrucose, 17-26/x in diameter. 



Uredospores — Sori roundish, scattered or crowded, cinnamon- 

 brown. Spores subglobose or elongate, yellowish brown, 

 echinulate, 17-20 X 20-25/^. 



Teleiitospcres — Sori roundish or elliptical, blackish. Spores sub- 

 globose or shortly elliptical, finely but closely punctate when 

 recent, apex only slightly thickened, 20-30 x 17-20/^ 

 Pedicels long, colourless, fragile. 



Synonyms. 



Uromyces pisi (Pers.). Winter in Rabh., " Krypt. Flor.," 

 vol. i. p. 163. 



Undo appendiculata, /?. pisi. Pers., " Observ. myc." in Usteri, 

 Annal. d. Botan., vol. xv. p. [7. 



Uromyces pisi, De Bary. Cooke, " Grevillea," vol. vii. p. 135, 



^cidium cyparissicB. I). C, "Flore frang.," vol. ii. p. 240. 



^cidiospores on Eupliorhia cyparissias. 

 Uredospores and teleutospores, on tisum sativum. 



