37*2 



THE RUSTS OF NOVA SCOTIA. ERASER. 



Pycnia and aecia on Cicuta maculata L. Not collected in 

 Nova Scotia, but obtained from cultures by the writer. (See 

 Mycologia4:l78. 1912). 



Uredinia and telia on Scirpus campestris Var. paludosus 

 (A. Nelson) Feriiald. S. validus Vahl., Pictou. 



Arthur has shown by cultures that aecial stage is on Cicuta 

 culata (Arthur, Jour. Mycol. 13:199. 1907). European 



investigators have 

 shown that this 

 species produces aecia 

 on a number of differ- 

 ent hosts. Arthur in 

 the "North American 

 Flora" lists eollec- 



Teliospores of Uramyces Seirpi. tionS f aeda Qn 



Cicuta bulbifera L., 



Oenanthe calif ornica S. Wats., Slum cicutae folium Schrank, 

 and Glaux maritime L. as belonging to this species as well as 

 the aecia on Cicuta maculata. 



The description is from the collection on Scirpus campes- 

 tris Var. paludosus. The uredinia and urediniospores are 

 similar on Scirpus validus except that the uredinia remain 

 covered in the. latter. The telia on Scirpus validus are placed 

 immediately beneath the stomata embedded in the tissues; they 

 .are small, numerous, and do not break through the epidermis. 

 The teliospores are sometimes as long as 70/* and somewhat 

 irregular in shape, probably due to the pressure of the strong 

 epidermis. The pedicel is very short or obsolete. 



Uromyces perigynius Halsted. 

 Uromyces Solidagini-Caricis Arth. 

 Nigredo perigynia (Halsted) Arth. 



0. Pycnia epiphyllous, sometimes amphigenous, grouped 

 on yellow spots, honey-yellow. 



