360 THE RUSTS OF NOVA SCOTIA. FRASER. 



II. Uredinia hypophyllous, scattered on discoloured areas, 

 roundish, very small, opening by a central aperture, the 

 spores oozing out in a small column. Urediniospores ovoid or 

 fusiform, 10-15 by 27-45/A, acute with apex prolonged into a 

 slender beak, 5-16/* long; walls colourless, thin, smooth except 

 two longitudinal lines of very minute papillae, only visible 

 when dry. 



III. Teliospores numerous, in the mesophyll of the leaf, 

 aggregated in the areas occupied by the uredinia, globoid, 

 15-25 by 22-30/*, 2-4 celled, wall thin, colourless. 



On Aspidium Thelypteris (L.) Sw., Pictou, .Oakneld; 

 Asplenium Filix-femina (L.) Bernh, Pictou. 



This rust did not seem very common but was collected in 

 several places near Pictou, the first collection being on Sep- 

 tember 11, 1909. My collections show abundant uredinia and 

 telia but few aecia. It has been reported from Massachusetts 

 but that seems to be the nearest station. It is probably, how- 

 ever, not rare. 



Uredinopsis Phegopteridis Arth. 



I. Aecia unknown. 



II. Uredinia hypophyllous, scattered on discoloured 

 nreas bounded by the veins, roundish, small, brownish-yellow. 

 Urediniospores ovoid or fusiform, 10-16 by 2T-58/*; >acute or 

 accuminate, prolonged into a long and slender beak, 12-32/x 



long; wall colourless, thin, smooth except 

 two longitudinal lines of minute papillae. 



III. Teliospores scattered in the 

 mesophyll, 2-4 celled, chiefly globoid, 16-25j 

 in diameter; wall colourless, thin, smooth. 

 On Phegopteris Dryopteris (L.) Fee, Pic- 

 5. Urediniospores of tou, September, 1910. 



Uredinopsis 



Phegopteridis. The long slender beak of this species 



is characteristic. It does not seem to be common. Arthur in 

 the "North American Flora" records it only from Wisconsin. 



