12 Journal of Mycology [Vol.14 



12. PucciNiA on Poa loiigiligiila Scribii. &. 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 of 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. PuccjNiA on Eriocoma cuspidata Nutt. {Oryr:opsis 

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

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

 Hypoxis crccta, Symphoricarpos racemosns, M erf ens a sp (from 

 Colorado), Triosteum pcrfoliatuni, Aquilegia coerulea, Thalict- 

 rum polygamuni, Amelanchicr Canadensis, Hydrophyllum Vir- 

 ginicum, Solidago Canadensis, Laciniaria spicafa, Ranunculus 

 recurvafus, Cassia Chaiiiaecrista, and Psoralea Onobrychis, with 

 no infection. 



14. PucciNiA on Agropyron repens (L.) Beauv., collected 

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

 Polymnia Canadensis and Hydrophyllum Virgimcnm, with no 

 infection. This is a leaf rust having close resemblance to 

 Pnccinia rnbigo-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 Dccodon verticillafiis, with 

 no infection. 



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

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

 on Aesculus glabra, Symphoricarpos racemosus, Napaea dioica, 

 Silphiiini perfoliatum, Ranuncuhi.: recurvatus. Psoralen Ono- 

 brychis, Polygala Senega, Viola cncuUata, Apocynum canna- 

 binum, Polemonium reptans, Ambrosia trifida, Scnccio oboiatus, 

 Dirca palustris, Dccodon verticillatns, and Bidens frondo<:a, with 

 no infection. This rust appears to be morj^hologically identical 

 with the European Uromyces Junci, which has aecia upon 

 Pulicaria dysinterica, 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 Lathyru'^ de- 

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

 Cockerell, was sown on Lathyrus palusfris and Euphorbia Ar- 

 kansana Colnradensis, with no infection. This rust is believed 

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

 not rcadilv cxolained. 



