102 



Jan. 1908] Cultures of Uredineae in igoy 13 



The following species of rusts were successfully grown, and 

 the data supplement that obtained from previous cultures of this 

 series, or that recorded by other American or European investi- 

 gators. The results with Gymno sporangium are the most con- 

 siderable since the work done by Dr. Roland Thaxter, concluded 

 at the Connecticut Experiment Station in 1890. 



1. Puccinia albiperidia Arth. Teliosporic material on 

 Car ex crinita Lam., collected in the vicinity of Lafayette, Ind., 

 by Mr. F. D. Kern, was sown on two plants of Ribes Cynosbati 

 on April 16, giving rise to pycnia April 25, and aecia May 6 

 in one case, and in the other to pycnia April 29, and aecia 

 May 14. 8 



2. Puccinia Caricis-Asteris Arth. Teliosporic material 

 on a narrow leaved Carex, collected at Ithaca, N. Y. by Mr. C. W. 

 Edgerton, was sown May 8 on Aster paniculatus, Iris versicolor, 

 Ribes Cynosbati, and Solidago Canadensis, with infection only 

 on the first named host, showing pycnia May 16, and aecia May 

 24. The collection was made adjacent to a clump of Iris 

 versicolor, covered with aecia, and there was a possibility of 

 genetic connection, which the culture dispels. 



The 24th fascicle of Fungi Columbiani contained a specimen 

 (No. 2366) of Carex rust labelled Puccinia tenuistipes Rostr., 

 and collected as late as November, 1906, at London, Ont. As 

 this species of rust has its aecia on Centaurea lacea, according 

 to a culture made by Schroter in 1885, and as that host is only 

 occasionally found in North America along the seacoast, and 

 no aecia having been seen on it in these localities,I wrote to Mr. 

 J. Dearness, the collector, for further information and material. 

 He most kindly secured viable material for me from the identical 

 locality. This was sown May 15 on Ribes Cynosbati, Aster 

 cordifolius, and Solidago Canadensis, with no infection. It was 

 sown again May 25 on Aster cordifolius and Erigeron annuus, 

 this time with the production of a few pycnia by June 10 on the 

 Aster, but without formation of aecia. Still a third essay was 

 made by sowing June 5 on Aster paniculatus, followed by an 

 abundance of pycnia June 12, and aecia June 19, thus estab- 

 lishing the identity of the rust. 



In visiting the locality in the spring of 1907, Mr. Dearness 

 discovered that the host is not Carex varia, as published, but C, 

 rosea Schk., and he has forwarded ample material to verify the 

 determination. 



In justification for the use of the name applied to the rust, 

 Mr. Dearness writes, under date of June 22, 1907, that a col- 

 lection was sent to the late Mr. J. B. Ellis in September, 1889, 



"For previous cultures see Jour. Myc. 5:53. 1902; 10 ill. 1904; 

 11 :58. 1905; i^:14. 1906; i?:196. 1907. 



