THE RUSTS OF NOVA SCOTTA. FRASEK. 



On Chiogenis hispidula (L.) T. & G., Pictou, Truro. 



The description is based on that of Arthur in the ''N 

 American Flora." The collections contained only uredinia, 

 but probably telia developed later. The species seems to be 

 rather local in its distribution. 



! 



( 3 KO X A I IT 1 1" M Fries. 



Cycle of development includes pycnia, accia and teliu, 

 heteroecious. 



Pycnia broad and flat. 



Aecia with membraneous peridium, rupturing at the sides. 

 Aeciospores coarsely verrucose with deciduous tubercules. 



Uredinia with peridium. IJrediniospores boi*ne singly on 

 pedicels, pores obscure. 



Telia erumpent, the catenulate teliospores adhering to 

 form a long cylindrical or filiform column, horny when dry. 

 Teliospores one-celled. 



Cronartium Comptoniae Arth. 



& I. On Pinus rigida Mill., P. virginiana Mill., P. 

 sylvestris L. (Not collected in Nova Scotia). 



17. Uredinia hypophyllous, scattered or gregarious, small, 

 round, dehiscent by a central opening, pulverulent; peridium 

 with polygonal cells, larger at the top with very thick walls. 

 Urediniospores oval or obovate, 13-21 by 30-60/>t; Avail colour- 

 less, thick, sparsely and finely (.'chinulate. 



TIT. Telia columns hypophyllous, filiform, about 55-135/* 

 thick and 1-H mm. long. Teliospores fusiform-oblong, 13-17 

 by 30-60/A; wall colourless, smooth, thin. 



IJredinia and telia on Myrica Gale L., Picton, August 25, 

 1010. 



