THE RUSTS OF NOVA SCOTIA. PHASER. 423 



On Luzula campestris Var. multiflora (Ehrk.) Celak., New 

 Glasgow; L. saUuensis Fernald, New Glasgow, French Kiver, 

 Truro. 



The uredospores appear in early spring, so that it is very 

 probable that the mycelium is perennial, as the leaves of the 

 host remain green during the winter. 



Plowright worked out the life history of this rust showing 

 that the aecial stage is on Bellis perennis. No cultures have 

 been made to establish the identity of the American and 

 European rusts. 



Puccinia cinerea Arth. 



& I. Py'cnia and aecia on Ranunculus cymbalaria 

 Pursh. 



II. Uredinia mostly caulicolous, sometimes on the. leaves, 

 linear, 1 mm. or less, ferruginous, pulverulent, ruptured epider- 

 mis evident. Urediniospores oval or obovate, 18-23 by 27-33/t*; 

 wall colourless, medium thick, very finely echinulate; contents 

 orange-yellow. 



III. Telia amphigenous and caulicolous, linear, remain- 

 ing covered by the epidermis, blackish. Teliospores clavate, 

 oval, or oblong, rounded, truncate or narrowed at the apex, 

 chiefly narrowed at the base, slightly or not constricted at the 

 septum, 16-23 by 32-50/x; wall yellowish-brown or dark brown, 

 slightly thickened at the apex, smooth; pedicel short, tinted, 

 persistent. 



Pycnia and aecia on Ranunculus cymbalaria Pursh., 

 Pictou. 



.Uredinia and telia on Puccinellia maritima (Huds.) Parl., 

 Pictou, September, 1910. 



Arthur (Mycologia 1:246. 1909) by infection experiments 

 showed that Puccinia cinerea has its aecial stage on Ranunculus 



cymbalaria. 



