402 



THE RUSTS OF NOVA SCOTIA. — FRASER. 



Teliospores of Pnccinia Asteris. 



On Aster macrophyllus L., Westville, Truro; .1. aciimi)iafus 

 Michx., Folleigh Lake; A. laterifiorus (L.) Britton, Pictou. 



The teliospores on Asfer 

 ncuniinatus are slenderer 

 tlian on Aster macrophyll- 

 us. The 2;rou]i:^ of telia 

 arc not so crowded nor so 

 abundant on the former. 



P. Asteris occnrs on a 

 number of asters. Mor- 

 phological differences exist 

 but they are not constant, so separation cannot be made on 

 these grounds. Cultures alone can show whether more than one 

 species are included. 



Puccinia Cicutae Lasch. 



0. Pvcnia not observed. 



T. Aecia on the nerves of the leaves more frequently <va 

 the petioles and stems, causing deformation, ])eridinni ])oorly 

 develojied, not cu]^-shaped. lu'eaking through the e]udenuis and 

 ru]ituring irregularly. Aeciospores globose, sub-globose or 

 ellipsoid, ir)-22 by 20-27^, snbhyaline. finely punctate. 



IT, Uredinia am])higenons. mostly hy]»o]»hyllous, small, 

 scattered, circular, pulvernlenf. light brown. Urediniospores 

 ovoid or elli])S lid, 20-24 by 20-.^0ju ; wall jiale brown, echinulate, 

 pores o. 



Tir. Telia siniibir to the iiredinia but larger and darker. 

 Teliosjtores ellipsoid or oblong, 20-30 by 30-41/x, rounded at 

 both ends, slightly constricted at the septum ; wall much 

 roughened, sometimes almost smooth, not thickened at the apex, 

 l)rown ; pedicel hyaline, slender, deciduous, u]) to 30/x, some- 

 times jdaced laterally on basal cell. 



On f^iriitn nmnihtta L.. Pictou. Piedmont. 



