410 THE RUSTS OF NOVA SCOTIA. FRASER. 



ish-brown. TJrediniospores globose, ellipsoid or ovoid, 1Y-22 

 by 22-3 3/*; wall yellowish-brown, echinulate. 



III. Telia hypophyllous, scattered or often arranged in 

 circular groups, abundant, at length covering the under sur- 

 face of the leaf, confluent, rounded on leaves, elongate on stem, 

 remaining covered by the epidermis, blackish-brown. Telio- 

 spores clavate or oblong, 17-22 by 35-65/A, rounded, truncate 

 or pointed above, mostly narrowed toward the base, slightly 

 constricted at the septum, sometimes no constriction; wall 

 dark brown, thickened at apex, about 7ju, smooth; pedicel 

 hyaline or slightly coloured, usually shorter than the spore. 



On Polygonum amphibium L., Pictou. 



This rust was only found in one place at Cole's Pond near 

 Pictou. It has a world wide distribution on Polygonum 

 species. On some hosts the telia remain covered by the 

 epidermis, in others they are soon naked. 



Tranzschel was the first to show by cultures that the aecia 

 "on the wild geranium belonged to this rust. Arthur (Jour. 

 Myc. 11:59. 1905) sowed the spores of Aecidium sanguino- 

 lentum Lindl. from Geranium maculatum on Polygonum 

 emersum (Michx.) Britton and produced the uredinia and 

 telia of this rust In the following year he sowed the teliospores 

 from Polygonum emersum on Geranium maculatum and the 

 aecia developed. \ 



I have not found the >aecial stage, nor even the host plant, 

 in this vicinity. 



Puccinia punctata Link. 

 Puccinia Galii Schw. 

 P. asperula Fuck. 

 0. Pycnia collected in small groups, honey-coloured. 



