Fraser: Cultures of Heteroecious Rusts 181 



PucciNiA Caricis-Solidaginis Arth. 



A collection on Carex scoparia Schk. was sown on Solidago 

 graminifoUa (L.) Salisb. on May 7 with pycnia May 25 and aecia 

 on June 13. Arthur (Mycol. 4: 15. 1912) established this con- 

 nection with teliosporic material collected in Maine. 



A Puccinia on Car ex stipata Muhl. heretofore called Puccinia 

 Peckii, was sown on Solidago (rugosaf) on June 5 with very 

 abundant pycnia on June 11, but the plants died soon after, so 

 that the aecia did not mature. Strong field evidence of connec- 

 tion suggested the sowing. It seems from the culture and the 

 field observations that the Puccinia on Carex stipata which has 

 passed as Puccinia Peckii in this region belongs to P. Caricis^ 

 Solidaginis. 



Puccinia Asteris-Caricis Arth. 



Teliosporic material from Carex trisperma L. was sown on 

 Aster acuminatus Michx. on June 12 with pycnia on June 20 

 and aecia by July 1, both in great abundance. Another sowing 

 on July 10 on the same host also gave abundant pycnia and aecia. 

 This connection was supported by strong field evidence. 



Uromyces perigynius Halst. 



A collection of teliosporic material on Carex deflexa Hornem. 

 was sown on Solidago {rugosaf) on May 25 with pycnia on June 

 I and aecia on June 21. Another sowing on May 25 on Solidago 

 hicolor L. gave pycnia on June 6 followed by aecia on June 21, 

 both in abundance. 



Another collection on Carex scoparia was sown on Solidago 

 graminifoUa (L.) Salisb. on May 28 with very abundant pycnial 

 infection by June 6. The plants died in a few days, probably 

 from the severe infection. The field evidence of the connection 

 of these forms was as conclusive as such evidence could be. 



A collection on Carex intumescens was sown on Solidago 

 (species undetermined) successfully. Field evidence of connec- 

 tion suggested a sowing on Aster which was made on June 15, 

 with very abundant pycnia on June 25 but the plants died in a 

 few days later, probably from the severe infection, so that no 

 aecia developed. The species of Aster was probably puniceus, 

 but a certain determination could not be made. 



