220 Mycologia 



material from Nebraska was sown two years ago on four other 

 species of hosts. ^ 



11. PucciNiA Ellisiana Thum., on Andropogon scoparius 

 Michx., collected at Ayr, Neb., by Rev. J. M. Bates, was sown 

 on Ceanothus americanus, Aesculus glabra, Lepargyraea can- 

 adensis, Symphoricarpos racevnosus, Mimulus ringens, Laciniaria 

 punctata, Lithospernmm angustifolium, Chelone glabra, Ranun- 

 culus septentriojialis and Mertensia virginica. 



Another collection on the same host and by the same collector 

 from Scotia, Neb., was sown on the first six hosts mentioned, 

 and also on Laciniaria spicata, L. scariosa, Cassia Chamaecrista, 

 Hydro phylluin virginicvun, Poly gala Senega, Petalostemon pur- 

 pureum and Phacelia bipinnatifida. 



The same species of rust on A. glomeratus (Walt.) B.S.P., 

 collected at Asheville, N. C, by Mr. F. D. Kern, was sown on 

 Cassia Chamaecrista, Lepargyraea canadensis and Petalostemon 

 purpureum, as in the preceding cases, and also on Baptisia tinc- 

 toria, Abronia fragans and Viola cucullata. 



The results were uniformly negative, there being no infection. 

 In the two preceding years this rust was sown on nineteen other 

 species of hosts. 



12. Uromyces graminicola Burr., on Panicum virgatum L., 

 collected at St. Paul, Neb., by Rev. J. M. Bates, was sown on 

 Callirrhoe involucrata. Althaea rosea. Hibiscus militaris, Sidalcea 

 oregana and Viola cucullata, with no infection. Similar ma- 

 terial was sown last year on four of these same hosts, and on 

 four other species without effect.^ 



13. Uromyces Junci (Desm.) Tul., on Juncus Balticus Willd., 

 collected at Kulm, N. D., by Dr. J. F. Brenckle, was sown on 

 Pulicaria dysenterica, with no infection. Another collection on 

 the same host from Colorado, sent by Mr. E. Bethel, was sown 

 on Pulicaria dysenterica, both seedlings and strong shoots, and 

 on Grindelia squarrosa and Arnica sp., with no infection. In 

 1907 a similar collection from Nebraska was sown on fifteen 

 other species of hosts. ^ This common American rust is usually 



® See Jour. Myc. 14: 10. 1908. 



^ Jour. Myc. 14: 10. 1908; Mycol. i: 231. 1909. 



^ Mycol. 1: 232. 1909. 



^ See Jour. Myc. 14: 12. 1908. 



