THE RUSTS OF KOVA SCOTIA. FRASEK. 425 



ing the 'whole of the spot, cup-shaped or short cylindrical, law, 

 margin white, revolute, lacerate. Aeciospores globose, sub- 

 globose or ellipsoid, about 16-18/* in diameter, verrucose, 

 orange. 



II. Uredinia hypophyllous, in small yellowish spots, 

 scattered, minute, ovate or oblong, at first covered by the 

 epidermis, at length nlaked, pulverulent, brown. Uredinio- 

 spores globose, sub-globose or ellipsoid, 17-22 by 18-33/x, 

 remotely echinulate, brown, pores two. 



III. Telia hypophyllous or culmicolous, scattered or 

 aggregated, small, ovate or oblong, long covered by the epider- 

 mis, pulvinate, black. Teliospores clavate or oblong-clavate, 

 13-24 by 35-60/n, apex rounded, truncate or long conical, base 

 narrowed, slightly constricted at the septum; wall yellowish- 

 brown, much thickened and darker at apex, smooth; pedicd 

 hyaline, persistent, equalling the spore. 



Pycnia and aecia on Lactuca spicata (Lam.) Hitche. and 

 Var. integrifolia (Grey) Britton; L. canadensis L., Pictou. 



Uredinia and telia on Carex muricata L., (Europe). (Not 

 collected in Nova Scotia). 



Arthur (Jour. Myc. 13:194. 1907) produced what he 

 regards as the aecia of this rust on Lactuca from the teliospores 

 of an undetermined Carex. Bubak had previously worked out 

 the connection for the European rust by cultures. The aecia 

 are so characteristic that there is little doubt that they belong 

 to this species, and that the telial form on Carex will yet be 

 found. 



Puccinia Caricis=Asteris Arth. 



0. Pycnia cpiphyllous, in small groups on the spots that 

 bear the aecia. 



1. Aecia hypophyllous, usually grouped on yellowish spots, 

 cup-shaped or cylindrical, low, margin revolute, lacerate. 

 Aeciospores angular globose, about 13-16/*; wall colourless, 

 finely verrucose; contents yellow. 



