THE KUSTS OF Xf)VA SCOTIA. FRASER. 355 



On Pyrola elliptica jSTutt., Pictou, Oct. 4, 1910. 

 Only the iiredinial stage was collected. The species does 

 not seem to be common. 



Pucciniastrum minimum (Sehw.) Arthnr. 



0. Pjcnia hypophy lions, rarely epiphyllons, nnmerons, 

 scattered, inconspicnons. 



1. Aecia hypophyllous in two rows, occupying part or 

 usually all of the leaf, cylindrical, small, about .5-1 mm. high; 

 peridium colorless, dehiscing at the apex, cells joined loosely, 

 slender. Aeciospores broadly ellipsoid, 13-17 by 19-27/*; wall 

 colourless, rather thin, finely and evenly verrucose. 



II. Uredinia hypophyllous, small, scattered or chiefly 

 grouped on indefinite discoloured areas, mammillose, pale 

 yellow, dehiscent by a central pore, finally pulverulent, long 

 covered by the overarching epidermis ; peridium hemispherical, 

 cells smiall, cuboidal. Urediniospores ellipsoid or obovate- 

 oblong, 15-18 by 19-27/".; wall colourless, thin, finely and 

 sparsely echinulate. 



III. Telia amphigenous, chiefly epiphyllons. Teliospores 

 in the epidermal cells, ellipsoid or globoid, 16-24 by 19-35/1*; 

 wall uniformly thin, pale j^ellowish, smooth. 



Pycnia and aecia on the leaves and cones of Tsuga canaden- 

 sis (L.) Carr., Pictou, July, 1911, 



Uredinia and telia on Bhodora canadense (L.) BSP., 

 Pictou. 



This species Avas found to be rather common near Pictou 

 on Bhodora canadense. The aecial stage was shown by cul- 

 tures of the writer to occur on the leaves and cones of Tsuga 

 canadensis (see Mycologia 4:184. 1912). This stage was 

 determined as Periderniium PecJcii by Dr. Arthur. The aecia 

 were much lighter in colour than the much more common aecia 

 on Tsuga canadensis which has usually passed as Peridermium 

 PecJcii. The more common form doubtless belongs to 

 Pucciniastrum Myrtilli. 



