21 



2i BOTANICAL GAZETTE L January 



it is distinct or not from the similar aecidia which have been 

 found on the other hosts mentioned cannot now be stated. 



7. Aecidium Solidaginis Schw. Having found Puccinia teleu- 

 tospores on Carex Jamesii Schw., they were sown on four species 

 of Ribes, with no infection. They were then sown on six species 

 of Aster, with no infection. At about the same time, May 9, 

 they were sown on Solidago canadensis L., and followed by sper- 

 mogonia May 15, and aecidia May 22. On May 24 a sowing 

 was again made on *S. ca?iadensis, and also on 6'. ulmifolia Muhl., 

 5. caesia L., 5. rigida L., and S. serotifia Ait., all of which pro- 

 duced spermogonia in ten to twelve days, but only the last 

 developed aecidia. Part of these trials were repeated, and sow- 

 ings also made on three additional species of Solidago, but with- 

 out success. These failures appear to have been due chiefly to 

 the feeble condition of the host plants. 



A collection of Puccinia on Carex stipata Muhl., sent by Mr. E. 

 W. D. Holway from Decorah, Iowa, was used for cultures on 

 four species of Ribes, and on Erigeron a?inuus and Onagra bien?ris, 

 with no infection. Afterward it was tried, May 27, on Solidago 

 canadensis, giving spermogonia June 2 and aecidia June 9. On 

 the same date it was sown on 5. serotina, giving spermogonia 

 June 2 and aecidia June 1 1. 



As the specific name So/idaginis is already employed in the 

 genus Puccinia, I propose for this species the name of Puccinia 

 Caricis-Solidaginis. A comparison of this species with P. Caricis- 

 Asteris and P. Caricis-Erigerontis shows many resemblances, and 

 it seems not improbable that the three represent more correctly 

 the biological variations of one species. However, in the many 

 cultures so far made no set of teleutospores has been found that 

 would infect more than one of the three host genera, Aster, 

 Erigeron, and Solidago. 



SUMMARY. 



The following is a complete list of successful cultures made 

 during the season of 1902. It is divided into the two series: 

 species previously reported by the writer or other investigators, 

 and species now reported for the first time. 



