384 THE RUSTS OF NOVA SCOTIA. FRASEH. 



III. Telia similar to those of U. Trifolii. 



On T. liybridum L., Pictou. 



This species differs from the more common rust on rcJ 

 clover hy the presence of aecia on the same host as the uredinia 

 and telia, also hy the different number of germ pores in the 

 urediniospores. It is also found on Tri folium repens L. 



The aecial stage was not collected. The description given 

 is based on that in the "North American Flora." 



Uromyces Hyperici-frondosi (Schw.) Arth. 

 Nigredo Hyperici-frondosi (Schw.) Arth. 

 Uromyces Hyperici Curt. 



0. Pycnia mostly hypophyllous; accompanying the aecia, 

 subepidermal, somewhat globose, about 140j* in diameter, 

 becoming blackish. 



1. Aecia hypophyllous and caulicolous, on orbicular 

 yellow or purple spots 2-4 mm. in diameter, in small rounded 

 groups on leaves, larger groups on the stem and "leaf veins, 

 cup-shaped, margin revolute, incised. Aeciospores angularly 

 globose, 16-22/u in diameter, finely verrucose. 



II. Uredinia hypophyllous, scattered, sparingly developed, 

 small, rounded, yellowish-brown. Urediniospores globose, sub- 

 globose or ellipsoid, 15-20 by 18-27/x; wall light brown, finely 

 ochinulate. * 



III. Telia hypophyllous or caulicolous, sometimes on pur- 

 plish spots, small and rounded on leaves, larger and elongated 

 and in groups on the stem, sometimes confluent, pulvinate, 

 blackish-brown or black. Teliospores subglobose ovate or 

 oblong, mostly ovate, 16-19 by 19-33/u, apex mostly rounded; 

 wall pale brown or dark brown, thickened at the apex up to 9/* r 



