THE RUSTS OF NOVA SCOTIA. FRASER. 401 



III.. Telia amphigenous, but mostly hypophyllous, small, 

 thickly scattered over the under surface of the leaves, occupy- 

 ing all or part of a leaf, orbicular, rather compact, straw- 

 yellow, becoming ochraceous. Teliospores oblong ellipsoid^ or 

 clavate, rounded above or somewhat acute, usually narrowed 

 toward the base, distinctly constricted at the septum, 13-20 by 

 28-45/j; wall hyaline or pale yellowish, smooth, thickened at 

 the apex, 8/* or less; pedicel hyaline, firm, usually equally the 

 spore or longer. 



On Hieracium scabrum Michx., Pictou. 



This species is probably distinct from Puccinia bicolor, but 

 it is placed here for the present. 



The telia develop early. They are evident by May I as 

 small yellowish dots, and by the last week of May the telio- 

 spores are germinating, and continue developing till the last 

 of June. Uredinia were present on some of the infected plants, 

 but they seem to belong to Puccinia Hieracii. The infected 

 leaves become elongated and yellowish in color, so that the rust 

 is quite conspicuous. 



Puccinia Asteris Duby. 

 0. Pycnia not observed. 

 I & II. Aecia and uredinia not formed. 



III. Telia mostly hypophyllous, on orbicular or irregular 

 spots coloured yellow, brown or purple, mostly crowded, com- 

 pact, brownish-black, surrounded by the ruptured epidermis. 

 Teliospores clavate, 16-22 by 30-60/*, rounded or pointed above, 

 narrowed toward the base, upper cell broaded, slightly con- 

 stricted at the septum, wall dark brown, much thickened at 

 apex, up to 12/A, smooth; pedicel nearly hyaline, rather broad, 

 usually shorter than spore, sometimes longer. 



