THE RUSTS OF NUVA SCOTIA, B^RASER. 385 



smooth ; pedicel hyaline or coloured above, equalling or exceed- 

 ing spore, fragile. 



On llypei-icum virginicum L., Pictou ; II. canadense L., 

 Pictou; //. cUipiicum Hook., Pictou, Folleigh Lake. 



This species is very common on the genus Hypericum in 

 the vicinity of Pictou. The teliosporos on H. ellipticum show 

 a much less thickened apex than on the other host plants. 



PHUACi.MIDUJM Link. 



Aecia of the caeoma type without peridium, but surrounded 

 by a dense crown of paraphyses. Aeciospores with numerous 

 germ-pores, scattered ; wall colourless. Uredinia also sur- 

 rounded by paraphyses. Urediniospores singly not in chains, 

 with numerous germ-pores. Teliospores three or more celled 

 in a vertical row (rarely two celled), usually several germ- 

 pores in each cell. 



This genus occurs only on the rose family. ])ietel 

 (Hedwigia 44:344. 1905) records 46 species, of these 17 are 

 found in Xorth America and four are here reported from !N'ova 

 Scotia. Arthur has added a new species from the western. 

 United States. (Torreya :24. 1909). 



Phragmidium americanitm Diet. 



0, I & IT. Pycnia, aecia and telia not collected. All are 

 formed. 



ITT. Telia hy))ophvlli)ns, on reddish-bro^vn, small, irregu- 

 lar spots, mostly scattered, small, bliick, readily detachable. 

 Teliospores oblong, 40-80 by 24-20^, obtuse at the apex with 

 colonrless a])iculu^ iiiostly\ 7-10 celled; wall dark brown or 

 almost l)lar'k, verrncose; pedicel longer than the spore, hyaline, 

 swelling in water at base. 



On /?o.<?(7 species, Picton, TTew Glasgow. 



