344 



THE RUSTS OF NOVA SCOTIA. FRASER. 



pulverulent, yellow or orange-yellow, ruptured epidermis 

 rather inconspicuous. Urediniospores globoid or ellopsoid, 

 16-22 by 19-35/i; wall rather thin, strongly verrncose; con- 

 tents orange-yellow, slowing fading to colourless. 



III. Telia hypopiiyllous, scattered or crowded and con- 

 fluent, roundish or irregular, slightly elevated, small reddisn- 

 orange. Teliospores terete, 18-25 by 54-85/A, round or obtuse 

 at both ends, wall swelling above 30-40/&; contents orange- 

 yellow; basidiospores globoid or ellipsoid, about 12 by 18/*, 

 yellowish. 



Uredinia and telia on Solidago and Aster species, Pictou, 

 Truro, etc. The following hosts were determined: Solidago 

 tricolor L., 8. rugosa Mill., 8. canademis L., Aster cordifolius 

 L., A. umbellatus Mill., A. lateriflo'rus (L.) Britton. 



The uredinial and telial stages of this rust are very com- 

 mon on the various species of SoKdago and Aster near Pictou, 



and probably throughout the 

 Province. The aecial stage is 

 found on Pinus rigida Mill, and 

 in North America is known only 

 from a small area from Massa- 

 chusetts to southern New 

 Jersey. (Arthur & Kern, Bull. 

 Torr. Bot. Club, 33:413. 1906). 

 Since the aecial stage (Peri- 



l. Section of telium of Coleospormm 

 Solidaginis. 



demium acicolum Und. & Earle) appears to be limited to a 

 small region along the Atlantic coast, and the other stages are 

 common almost throughout the United States and Canada, the 

 question arises how it passes the winter. Clinton carried out 

 some experiments that would tend to show that the mycelium 

 was not perennial in the rootstocks (Conn. Exper. Sta, Report 

 378, 1907). He believes that the mycelium of the fungus is 

 carried over the winter in the basal rosettes of young 

 which may survive the winter. 



