372 



THE RUSTS OF NOVA SCOTIA. — FRASER. 



Teliospores of Uromycea Srirpi. 



l*vcnia and aecia on Cicuta maculata L. Not collected in 



Nova Scotia, but obtained from cultures bv tho writer. (See 



Myeologia 4:178. 1012). 



Uredinia an<l tolia on Scirpus campestris Var. paludosus 



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



Arthur has shown by cultures that aecial stage is on Cicuta 



mandnfa (Arthur. Jour. Mycol. 18:199. 1907). European 



investigators have 

 shown that this 

 species produces aecia 

 on a number of differ- 

 ent hosts. Arthur in 

 the "North American 

 Flora" lists collec- 

 tions of aecia on 

 Cicuta hulbifera L., 



Oenanthe californica S. Wats., Sitnn cicidaefolium Schrank, 



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



the aecia on Cicuta maculata. 



The description is from the collecti(jn 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, iiunieroiis, and do not break through the epidermis. 

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

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

 epidermis. The perlicel is very short or obsolete. 



Uromyces perigynius Ilalsted. 

 TJromyces Solidagini-Caricis Arth. 

 Nigredo perigynia (Halsted) Arth. 



0. Pycnia epiphyllous, sometimes amphigenous, groupe^l 

 on yellow spots, honey-yellow. 



