376 THE BUSTS OF NOVA SCOTIA FRASER. 



and that the Puccinia hr;.s in course of time developed from 

 the Uromyces. The urediniospores are also alike and a few 

 mesospores are present in the Uromyces, which would tend to 

 strengthen the supposition. 



Uromyces Spartinae Farl. 

 Uromyces acuminatus Arth. 

 Nigredo Polemonii (Peck.) Arth. 



0. Pycnia chiefly epiphyllous, gregarious, in small groups, 

 not conspicuous, punctiform, honey-yellow, becoming brownish. 



1. Aecia chiefly hypophyllous, gregarious, more or less 

 crowded in groups on slightly discoloured spots, cupulate or 

 cylindrical, margin lacerate, slightly recurved. Aeciospores. 

 subgloboid, 15-24 by 18-27/*; wall colourless, rather thin, 

 evenly and finely verrucose. 



II. ITredinia epiphyllous, intercostal., linear, soon naked, 

 ruptured epidermis evident, yellowish-brown, not incon- 

 spicuous. Urediniospores globose or broadly elliptical, large, 

 22-32/A in diameter, a few 25 by 35/A; wall- thick when 

 immature, becoming thinner, yellowish, rather sparsely 

 echinulate, pores large, scattered. 



III. Telia similar to the uredinia but blackish-brown and 

 more conspicuous; teliospores obovate or oblong-clavate, 15-22 

 by 22-42/i ; wall dark brown, apex darker and thickened, 6-10/s 

 usually rounded or acuminate above, base narrowed; pedicel 

 slightly coloured, firm, usually longer than the spore, often twice 

 its length. 



Pycnia and aecia on Arenaria later flora L., SperguJarm 

 canadensis (Pers.) Don.. Pictou. 



Uredinia and telia on Spartina patens (Ait.) Muhl., $, 

 ylabra Var. atternifolia . (Loisel) Merr., S. 

 Hitcho... Pictou. 



