384 THE KUSTS OF NOVA St\)TlA. l-'RASEH. 



III. Telia similar to those of I . Trifolii. 



On T. hijhndnm J.., Pictou. 



This species differs from the more ('(iiumou rust on rcul 

 clover by the presence of aecia on the same host as the iiredinia 

 and telia, also hv the different nnmber of germ pores in the 

 urediniospores. It is also fonnd on Tri folium re pens L. 



The ae<*ial stage was not collected. The descri])tion given 

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



Uromyces Hyperici=frondosi (Schw.) x\rth. 

 Nigredo Hyperici-frondosi (Schw.) Arth. 

 Uromyces Ilyperiei Onrt. 



0. Pycnia mostly liy])o))hyll(ius, a<'('ompanying the aocia, 

 subepidermal, somewhat globose, about 140/u, in diameter, 

 becoming blackish. 



1. Aecia hypophyllous and caulicolous, on orbicnlar 

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

 groups on leavas, larger groups on the stem and leaf veins, 

 cup-shaped, margin revolute, incised. Aecios]V)res angnlarly 

 globose, 10-22iu in diameter, finely vei-rucose. 



II. TTredinia hvpophyll(»us. scattered, s])aringly developed, 

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

 globose or ellipsoid, 15-20 by 18-27]"-; wall light bro\m, finely 

 echinulate. 



III. Telia hvj)ophynous or caulicolous. sometimes on pur- 

 plish spots, small and rounded on leave-;, larger and elongated 

 and in gnHi])s on the stem, sometimes confluent, pulvinate, 

 blackish-brown or black. Telios])ores subglobose ovate or 

 oblong, mostly ovate, 10-10 by 19-88/i, apex mostly rounded; 

 wall pale brown or dark brown, thickened at the apex up to 0/^, 



