230 



Mycologia 



same host, which developed under exactly the same conditions in 

 the greenhouse. The latter were, short and cupulate and much 

 paler in color. The field collections also showed the same differ- 

 ences. 



Observations in 1920 and 1921 in the same region also indicated 

 the connection of aecia on Plantago eriopoda Torr. with Puccinia 

 subnitens on Distichlis stricta (Torr.) Rydb. Inoculations were 

 made on three pots of Plantago eriopoda on May 27. Heavy 

 pycnial infections appeared on all the plants, followed by aecia. 

 The aecia showed the characters of Puccinia subnitens, the outer 

 wall of the peridial cells being much thickened. The aecia were 

 not so long as those of P. subnitens on Glaux maritima grown in 

 the greenhouse at the same time and under the same conditions, 

 nor was the production of aecia so abundant. 



Many cultures by Arthur and by Bethel (Phytopath. 7: 92. 

 1917; 9: 193. 1919) have shown that P. subnitens is a species 

 with a large number of aecial hosts in many families. Arthur, in 

 the North American Flora, lists twenty-one families (including 

 Glaux maritima) . These experiments have added two new fami- 

 lies to the list of aecial hosts. Arthur (Mycol. 9: 306. 191 7; 

 Bot. Gaz. 25: 17. 1903) has shown that Uromyces seditiosus on 

 Aristida has aecia on several species of Plantago. These experi- 

 ments show P. subnitens also has aecia on Plantago eriopoda. 



Summary of New Results 

 Puccinia Distichlidis Ellis & Ev. Inoculations with teliospores 

 from Spartina pectinata Bosc. produced pyenia and aecia on Glaux 

 maritima L. 



Puccinia subnitens Diet. Inoculations with teliospores from 

 Distichlis stricta (Torr.) Rydb. produced pyenia and aecia on 

 Glaux maritima L. and Plantago eriopoda Torr., but failed to in- 

 fect Dodecatheon pauciflorum (Durand) Greene. 



Summary of Results Confirming Previous Work 

 Uromyces Alopecuri Seym. Inoculations with teliospores from 

 Ranunculus apetalus Farr infected Alopecurus aristulatus Michx. 

 Dominion Laboratory of Plant Pathology, 

 University of Saskatchewan, 

 Saskatoon, Sask. 



