THE RUSTS OF NOVA SCOTIA. FRASER. 343 



THE RUSTS OF NOVA SCOTIA. 



Family 1. COLKOSPORIACEAK. 



Basidia internal, i. e. each original cell soon divides into 

 four superimposed divisions (the basidia), each of these 

 germinates by a single sterigma bearing a large basidiospore. 

 Telia waxy. Teliospores compacted laterally into layers, 

 sessile (in all North American species) ; walls weakly gelatin- 

 ous. 



This family is represented in North America by one genus, 

 Coleosporium, or according to Arthur's classification by two 

 genera, Coleosporium and Gallowaya, the life cycle of the latter 

 having only telia. The family is represented in Nova Scotia 

 by only one species, and no more are likely to occur as all the 

 other species thus far reported in North America are of a more 

 southern range. It is possible that C. Campanulae (Pers.) 

 Lev., which has been collected in Vermont may yet be found 

 to occur. 



COLKOSPORIUM L-v. 



Pycnia flattish, without ostiolar filaments. Aecia with 

 large peridium. Aeciospores having colourless Avail with 

 dense deciduous tubercles. Uredinia without peridium. 

 Urediniospores eaten ulate ; wall colourless, verrucose, pores 

 obscure. Telia waxy, usually roundish. Teliospores sessile, 

 one-celled, (appearing four-celled owin^; to early division of 

 contents) ; wall smooth, colourless, thickened and gelatinous at 

 the apox. 



Coleosporium Solidaginis (Schw.) Thuem. 



& I. On Pinus rifjida Mill. P&ridermium acicolum 

 TJnd. & Earle. 



II. Uredinia mostly hypophyllous, sometimes caulicolous, 

 scattered or sometimes gregarious, small, soon naked. 



