THE RUSTS OF NOVA SCOTIA. — FRASER. 429 



The limits of this species are not known at present. It 

 may be that more than one species is represented in the col- 

 lections assigned here. Possibly some of them belong to 

 Puccinia Grossulariae (Schum.) Arth. 



The collections on the Carex species assigned here were 

 shown by the cultures of the writer to have their aecial stages 

 on Bihes. (See Mycologia 4:180. 1912). Probably several 

 other collections on Carex species also belong to this rust. But 

 cultures are necessary before the relation of many of the rusts 

 on the genus Carex can be ascertained. 



Puccinia Eleocharis Arth. 



0. Pycnia epiphyllous. 



1. Aecia hypophyllous, grouped on yellow spots 3-4 mm. 

 in diameter, cylindrical, cup-shaped, low, margin revohite, 

 lacerate. Aeciospores mostly angular-globose or sub-globose, 

 a])out 14-1 8ju., hyaline, verrucose. 



II. Urediniospores mixed with the teliospores, irregularly 

 globose or ovoid, finely and sparsely echinulate, yellowish. 



III. Telia scattered or subgregarious, sometimes confluent, 

 small, rounded, remaining covered for a long time by the 

 epidermis which at length ruptures, sometimes- black. Telio- 

 spores oblong, rounded or obliquely subtruncate, 16-21 by 

 45-54/u, apex moderately thickened, not or slightly constricted 

 at the septum ; base rounded or often somewhat narrowed, 

 smooth, dark bro^vn ; pedicel thickened, very short. 



Pycnia and aecia on Eupatorium perfoliatum L., Pictou. 



Uredinia and telia on Eleocharis intermedia (Muhl.) 

 Schultes, E. palustris (L.) R. & S. (not collected). 



The aecial stage was found in only one place near Pictou. 

 The telial stage on Eleocharis was not collected, but as the host 

 plants are common and as the rust has been collected in Maine, 

 it probably occurs in T^ova Scotia. As the rust is incon- 

 spicuous it may easily be overlooked. 



Pkoc. & Trans. N. S. Inst. Sci. You XII. Tbans. 29 



