Fraser: Cultures of Heteroecious Rusts 193 



Puccinia alhiperidia Arth. Teliospores from Carex intumes- 

 cens Rudge, Carex debilis var. Rudgei Bailey, and Carex crinita 

 Lam. infected Ribes prostratum L'Her and teliospores from 

 Carex crinita Lam. and Carex arctata Boot, infected Ribes oxy- 

 acanthoides L. 



Puccinia Caricis-solidaginis Arth. Teliospores from Carex 

 scoparia Scbkuhr. infected Solidago graminifolia (L.) Salisb. and 

 from Carex stipata Muhl. infected Solidago {rugosaf). 



Puccinia Caricis-Asteris Arthur. Teliospores from Carex tri- 

 sperma L. infected Aster acuminatus Michx. 



2. Life histories worked out for the first time 



Necium Farloimi Arth. Teliospores from Tsuga canadensis 

 (L.) Carr. infected the same species. 



Melampsoropsis Pyrolae (DC.) Arth. Teliospores from Py- 

 rola Americana Sweet and Pyrola elliptica Nutt. infected cones 

 of Picea mariana (Mill.) BSP. and Picea canadensis (Mill.) 

 BSP. {Peridermium conorum-Piceae (Rees) Arthur). 



Pucciniastrum minimum (Schw.) Arthur. Teliospores from 

 Rhodora canadense (L.) BSP. infected leaves and cones of Tsuga 

 canadensis (L.) Carr. (Peridermium Peckii Thiim.). 



Uromyces Spartinae Farl. Teliospores from Spartina Michaux- 

 iana Hitch, infected Arenaria lateriflora L. but failed to in- 

 fect Spergularia canadensis (Pers.) Don. Teliospores from 

 Spartina patens (Ait.) Muhl. and Spartina glabra var. alterni- 

 flora (Loisel) Merr. infected Spergidaria canadensis but failed 

 to infect Arenaria lateriflora L. 



Melampsora arctica Rostr. Teliospores from Salix discolor 

 Muhl. infected Abies balsamea (L.) Mill. 



Melampsora (Medusae Thiim.?) Teliospores from Populus 

 grandidentata Michx. infected Tsuga canadensis (L.) Carr. 

 (Caeoma Abietis-canadensis Farl.). 



Macdonald College, Quebec, Canada. 



