THE RUSTS OF NOVA SCOTIA. FRASER. 3'8& 



II-. Uredinia hypophyllous or petiolioolous, 'mostly 

 scattered, small, sometimes confluent, pulverulent, soon naked r 

 surrounded by the ruptured epidermis, light brown. Uredinio- 

 spores globose, subglobose or ellipsoid, 22-27 by 23-30/*; wall 

 about 2fi thick, yellowish-brown, sparingly echinulate, pores 

 5-7. 



. III. Telia mostly caulicolous, oblong or rounded, some- 

 times confluent, covered for some time by the epidermis, at 

 length naked, pulverulent, dark brown. Teliospores globose, 

 subglobose, elliptical or oblong, 19-24 by 22-32/A, rounded at 

 the apex, with a small apical papilla at the germ-pore; wall 

 bright brown, smooth (sometimes very finely verrucose) ; 

 pedicel hyaline, slender, deciduous, about the length of the- 

 spore. 



On Tri folium pratense L., Pictou. 



The uredinal stage of this rust is very common on clover, 

 and must cause a considerable amount of injury. ~No aecial 

 stage is known. 



Uromyces Trifolii=repentis Liro. 

 Nigredo Trifolii (Hedw. F.) Arth. 



0. Pycnia chiefly epiphyllous, in small groups or spread 

 over larger areas, not conspicious. 



1. Aecia amphigenous, in roundish groups, or on the veins 

 and petioles in elongate groups, short cupulate ; peridium white 

 erect, or slightly recurved, finely erose, Aeciospores broadly 

 ellipsoid or somewhat angular, 15-17 by 16-2 I/A; wall light 

 yellow or nearly colourless, thin, finely verrucose. 



IT. Uredinia similar to U. Trifolii, but there are 3 or 4 

 equatorial germ pores, instead of 4-6 scattered ones. 



