352 



UREDINEAK. 



aecidia (Aec. parnassiae Schlecht. ) on I'linniKxin j><ilu$tris. Spermogonial 

 pycnidia are unknown. 



P. scirpi D. C. (Britain). Uredo- and teleutospores on Xcirj-ms; aecidia, 

 according to Chodat, = Aec. nymphaeoides on Nymphaea, Xn[>h<u; and Lim- 

 ii 1 1 n them urn n ympli aeoii l<'x. 



FIG. 186. /'en-;, i;,/ fiiaveolent on Cirsium arvcnse. The plants are abnormally 

 elongated ; the leaves have remained smaller and simpler, and are thickly beset 

 on the lower side with patches of chocolate-brown uredospores. (v. Tubcuf phot.) 



P. eriophori Tliiim. Uredo- and teleutospores on Eriophorum /"((folium 

 in Siberia and Denmark ; Rostrup gives as the aecidial form Aec. cinerari'*" 

 Rostr. 



P. obscura Schroet. Uredo- and teleutospores on Luzula ; aecidia on 

 Bellis perennis (Plowright). (Britain and LT.S. America.) 



P. septentrionalis .Tuel. Ured(- and teleutospores on Polygonum vivi- 

 parum; aecidia (.['<: Sommerfeltii) on Thnlli-trnin <t//>//it!m in Scandinavia, 



