SummaryUromyces AlopecuriSeym. Aeciospores fromRanunculus MacouniiBritton infectedAlopecurus aristulatusMichx.Puccinia angustataPeck. Teliospores fromScirpus atrovirensMuhl. infectedMentha canadensisL.Puccinia Impatientis(Schw.) Arth. Aeciospores fromImpatiens bifloraWalt. infectedHordeum jubatumL.Puccinia Phragmitis(Schum.) Koern. Teliospores fromPhragmitis communisTrin. infectedRumexSp.Puccinia AgropyriE.&E. Aecispores fromThalictrum dasycarpumFisch.&All. infectedElymus canadensisL.,E. virginicusL.,Hordeum jubatumL. andBromus ciliatusL. Uredospores fromBromus ciliatusL. failed to infectElymus virginicusL.,Agropyron SmithiiRydb.,A. tenerumVasey,A. repens(L.) Beauv. andHordeum jubatumL.