'MS THE UUST.S OV NOVA SCOIIA. — KKASKH. 



Accia on Silphiuyn irdefp'e folium Midi.. S. teribinthin- 

 nceuin Jacq., 8. pej-foliatvm L., ;S'. laciniatnvi ]\. (l^nt <-o]- 

 U'ioA in 'N. S.) 



Uredinia and telia on J uncus tenuis Wild.. Picton and 

 vicinity. 



The collections of this rust wen' so badly parasitized that 

 the descri]>tion is largely based on Arthnr's original descrip- 

 tion (Jour. Mycol. 13: 202. 

 ^^ lOO^). The aecial hosts are not 



fonnd in Nova Scotia. The rnst 

 is common. 



The rust has generally passed 

 as Uromyces Junci (Desm.) Tul. 

 Arthur (1. c.) showed by cultures 



Toliospores of Uromyccn Silphii. +u„4. aU •„! i. 



that the aecial stage is on 

 Silphium and separated the rust. The European Uromyces 

 Junci has its aecia on Pulicaria dysinterica. A rust not 

 morphologically distinct is found in western North America 

 and has passed under the name of Uromyces Junci though no 

 cultures have been made to determine its aecial stage. 



^to'- 



Uromyces effusus Arth. 



Uromyces Junci-effusi Syd. 

 Nigredo Junci-effusi (Syd.) Arth. 

 & T. Pycnia and aecia unknown. 



TI. Uredinia amphigenous, scattered, oblong or linear, 

 tardily naked, dark cinnamon-browm, ruptured epidermis 

 evident. Urediniospores broadly ellipsoid or oval, 14-19 by 

 18-26/^: wall light yellow, sparingly and bluntly echinulate, 

 jx>res 4, equatorial. 



III. Telia ami^higenous, numerous, scattered or collected 

 in groups about stem, oblong or linear, sometimes cx)nfluent, 

 ruptured epidermis conspicuous. 'IVdiospores obovate or oval, 



