12 X U X Journal of Mycology [Vol.14 



12. Puccinia on Poa longiligula Scribn. & Will., collected 

 at Boulder, Colo., by Mr. E. Bethel, was sown twice on Arabis 

 sp., with no infection. This rust was found so closely associated 

 with aecia on a species of Arabis, that it seemed almost certainly 

 to be genetically connected. Healthy plants of apparently the 

 same species of Arabis were secured from Colorado, and sow- 

 ings made, the spores giving strong germination, but without 

 positive results. The grass host was determined by Mr. P. L. 

 Ricker of the U. S. Department of Agriculture. 



13. Puccinia on Eriocoma cuspidata Nutt. (Oryzopsis 

 cuspidata Benth.), collected at Glenwood Springs, Colo., by Mr. 

 F. D. Kern and the writer, was sown on Phacelia bipinnatifida, 

 Hypoxis crecta, Symphoricarpos racemosus, Mertensia sp. (from 

 Colorado), Triosteum perfoliatum, Aquilegia coerulea, Thalict- 

 rum polygamum, Amelanchier Canadensis, Hydrophyllum Vir- 

 ginicum, Solidago Canadensis, La-ciniaria spicata, Ranunculus 

 recurvatus, Cassia Chamaecrista, and Psoralea Onobrychis, with 

 no infection. 



14. Puccinia on Agropyron re pens (L.) Beauv., collected 

 in Kenosha county, Wis., by Dr. J. J. Davis, was sown on 

 Polymnia Canadensis and Hydropliyllum Virginicum, with no 

 infection. This is a leaf rust having close resemblance to 

 Puccinia rubigo-vera on cereals. 



15. Uromyces Rhyncosporae Ellis, on Rynchospora alba 

 (L.) Vahl., collected at London, Ont., by Mr. J. Dearness, was 

 sown on Menyanthes trifoliata and Decodon verticillatus, with 

 no infection. 



16. Uromyces Junci (Desm.) Tul., on J uncus Balticus 

 Willd., collected at Scotia, Neb., by Rev. J. M. Bates, was sown 

 on Aesculus glabra, Symphoricarpos racemosus, Napaea dioica, 

 Silphium perfoliatum, Ranunculus recurvatus, Psoralea Ono- 

 brychis, Polygala Senega, Viola cucullata, Apocynum canna- 

 binum, Polcmonium reptans, Ambrosia triUda, Senecio obovatus, 

 Dirca palustris, Decodon verticillatus, and Bidens frondosa, with 

 no infection. This rust appears to be morphologically identical 

 with the European Uromyces Junci, which has aecia upon 

 Pulicaria dysi)iterica, a host that was not at hand when sowings 

 were being made. It is clearly distinct from the rust on Juncus 

 tenuis, Uromyces Silphii (Syd.) Arth., not only on account of 

 its structure, but because it refuses to grow on Silphium. 



17. Uromyces Orobi (Pers.) Lev., on Lathyrus de- 

 capetalus Pursh, collected at Boulder, Colo., by Prof. T. D. A. 

 Cockerell, was sown on Lathyrus palustris and Euphorbia Ar- 

 kansana Coloradensis, with no infection. This rust is believed 

 to be an autoecious species, and the failure to infect Lathyrus is 

 not readily explained. 



