382 THE RUSTS OF NOVA SCOTIA. FRASER. 



Uromyces Fabae (Pers.) De Bary. 

 Nigredo Fabae (Pers.) Arth. 



0. Pycnia hypophyllous, scattered among the aecia. 



1. Aecia hypophyllous, on yellow spots, solitary or in 

 rounded or elongated groups; peridium short, cup-shaped, 

 margin incised, revolute, whitish. Aeciospores angular globose 

 or ellipsoid, 12-14/u in diameter, yellowish, finely and densely 

 verrucose. 



II. TJredinia amphigenous, mostly scattered, circular on 

 the leaves, elongated on the stem, small, pulverulent, light 

 brown, surrounded by the ruptured epidermis. Urediniospores 

 mostly ellipsoid or ovate, 18-21 by 23-30/*; wall yellowish, 

 becoming light brown, sparingly echinulate, usually 3 some- 

 times 4 pores. 



III. Telia amphigenous, rounded on the leaves, elongate 

 and more abundant on the stem, pulvinate, dark brown to 

 blackish-brown. Teliospores obovate, clavate or subglobose, 

 17-24 by 22-43/x, rounded or conical, sometimes truncate 

 al>6ve ; ; wall brown, thickened at apex up to 10/*, smooth; 

 pedicel persistent, thickened, coloured, equalling or longer than 

 spore. 



On Vicia cracca L., Pictou. 



This species, is found on several genera of the Leguminosae. 

 It was collected on only one species, and seemed to be common 

 on that host. On some host plants aecia are abundantly pro- 

 duced, on others they do not seem to occur. . It may be that 

 Vicia cracca belongs to the latter class as no aecia were found. 



Uromyces Trifolii (Hedw. F.) Lev. 

 Nigrego fallens (Desmaz.) Arth. 

 & I. Pycnia and aecia unknown. 



