PLANTS OF IOWA 61 



735. G. rnacropus, Lk. 



On Red Cedar, Cedar apple. Rust on apple foliage. 

 Uredo. 



736. TJ. agrimonlce, DC. 



On Agrimonia eupatoria, L. 



737. TJ. boutelouce, Arthur (n. sp.) 

 On Bouteloua racemosa, Lag. 



738. TJ. iridis, Duby. 



On Iris versicolor, L. 



739. TJ. polypodii, (Pers.) 



On Pellaea gracilis, Hook. 



740. TJ. caeoma-nitens, Schw. 

 Abundant on blackberries. 



Cjeoma. 



741. C. luminatum, Schw. 

 On Rubus villosus, Ait. 



742. G. nitens, S. 



Rust on blackberry. 



iEciDIUM. 



743. A. actcece, Wallr. 

 On Actace alba, L. 



744. A. albescens, Grev. 



On Adoxa moschatellina, L. 



745. A. asteratum, Schw. 

 On Aster cordifolius, L. 



746. A. berberidis, Gmel. 

 On English barberry. 



747. A. caladii, Schw. 



On Arisaema dracontium, Schott. ; A. triphyllum, Torr. 

 . 748. A. pentstemonis, Schw. 



On Castillcia sessiliflora, Pursh. 



749. A. clematidis, DC. 



On Clematis virginiana, L. 



750. A. compositarum, Mart. 



On Ilolianthus strumosus, L. ; Rudbeckia lachiniata, L.j 

 Senecio aureus, L. 



