Feb., 1904.] Index to Uredineous Culture Experiments. 79 



College. More fruitful results were obtained byTliaxter in 1887 

 and again in 1889, — the connection between the several species of 

 Gymnosporangium and associated Roestelia occurring in this 

 country being satisfactorily established, which may be found in 

 print in the Proceedings of the American Academy of Arts and 

 Sciences, Boston ; and Bulletin 134, Conn. Agr. Exp. Sta. Pam- 

 mel repeated the experiment verifying connection in case of one 

 ■of the species (la. Hort. Soc. Rep. 1893), the same also b}^ 

 Stewart and Carver (Proc. la. Acad. Sci. for 1895, Vol. 3; same 

 in N. Y. Exp. Sta. for 1895). 



No connections between Uredineous forms were then experi- 

 mentally determined — except that Howell (in 1890) showed the 

 three stages of the Clover Rust to be genetically related, and 

 Clinton (in 1894) the two stages of the Bramble Rust — until 

 1899, when extended and important work was reported by Arthur 

 and by Carleton. The latter dealt with the Cereal Rusts only, 

 making sowings almost exclusively of Uredospores mainly from 

 Wheat, Oats, Barley, Rye and Maize, on the same and on differ- 

 ent host species. The interesting results were published as Bulletin 

 No. 16, U. S. Dept. Agr. Div. Veg. Physiology and Pathology, 

 April 23, 1899. 



Arthur communicated his first results to the public in a paper 

 read before the A. A. A. S., Botanical Section, Columbus, Ohio, 

 August, 1889, and the same was published in the Botanical 

 Gazette, 29 : 268-276, April, 1900. Of eleven species of Uridineae, 

 the aecidial and teleutosporic forms were definitely connected by 

 these cultures. In the Journal of Mj-cology (8:51-6), June, 

 1902, he reported cultures made in 1900 and 1901 — successful 

 inoculations in eight cases, four being repetitions of previously 

 demonstrated connections, and the complete cycle for four being 

 reported here for the first time. Arthur's third report (cultures 

 in 1 902 J was published in the Botanical Gazette (35 : 10-23) for 

 January, 1903. The successful cultures made number eleven 

 previousl}^ reported and seven reported for the first time. 



In 1902 cultures were undertaken b}- Kellerman. The first 

 case of demonstrated connection was published in the Journal of 

 Mycology (8 : 20), May, 1902, and appeared in the .same periodi- 

 cal (9:6-13) in February, 1903. This showed seven successful 

 inoculations, two of these not having been previously demonstra- 

 ted. The second report (continuing his work during 1903), 

 detailing more extended cultures, was given in part in the Journal 

 of Mycology (9 : 109-10), May, 1903, and the year's work is 

 reported in full in the Journal, December Number, 1903. 



This brief historical outline shows that as yet comparative!}' 

 few American mycologists have undertaken culture work to 

 determine life cycles of our numerous species of Uredineae. 



