THE RUSTS OF NOVA SCOTIA. FKASER. 397 



that there seems to be little doubt but that thej are connected. 

 Other collections on Taraxacum show no aecia. I have placed 

 there under P. Taraxaci and the former are assigned here to 

 P. variahiUSj yet it seems probable that they belong to the 

 same species. The aecia may only be produced under favour- 

 able conditions. 



The germ-pore of the basal cell of the teliospore is usually 

 placed low, not far from the pedicel ; that of the upper cell is 

 in the usual position near the apex. 



The aecial stage of a sedge rust also occurs on Taraxacum, 

 but has the aecia collected in large clusters, not scattered as in 

 P. variahUis. 



Puccinia Taraxaci (Rabent.) Plowr. 



0. Pycnia not observed. 



1. Aecia regarded as not formed. 



II. Uredinia amphigenous, scattered, small, rounded, or 

 oblong, pulverulent, brown. Urediniospores globose, sub- 

 globose or ovoid, 20-22 by 23-30/li, brown, echinulate. 



HI. Telia similar to the uredinia but blackish brown. 

 Teliospores ellipsoid or ovate-ellipsoid, 19-22 by 25-35/x, 

 rounded at both ends, little or not constricted at the septum; 

 wall imiform, thin, finely verrucose, brown ; pedicel hyaline, 

 short. 



On Taraxacum officinale Weber, Pictou. 



This species differs from P. variahilis in the absence of the 

 aecial stage. The germ pores of the urediniospores are two in 

 number and are placed toward the apex. 



Puccinia orbiculata Peck. 



0. Pycnia amphigenous, few, in smodl groups on spots 

 with the aecia. 



PRor. & Trans, n. S. Inst, sci., Vol. XII. Trans. 27. 



