PLANTS OF IOWA 55 



638. E. physalidis, (Kalch. & Che.) Farl. 



On Physalis virginiana, P. lanceolata, P. philadelphica, 

 P. heterophylla. 



639. E. polysporum, (Pk.) Farl. 

 On Ambrosia trifida, L. 



640. E. saniculae, Pk. 



On Sanicida canadensis, Torr. 



641. E. besseyi, Farl. 



On Physalis virginiana, Mill. 



642. E. leuto-maculans, n. sp. 

 In Blue-bells. 



643. E. pammelii, n. sp. 

 On Wild Rice. 



Urgcystis, Rabenh. 



644. U. agropyri, (Preuss.) Schroet. 



On Elymus robusius, S. & S., E. canadensis, and Browns 

 ciliatas, L. 



645. U. anemones, (Pers.) Schroet. 



On Anemone virginiana, L., Ilepatica acutiloba, D. C. 



646. U. colchici, (Schlecht) Rabenh. 

 On Polygonatum giganteum, Diet. 



647. U. occulta, (Wallr.) Whit. 



On Elymus canadensis, L., and rye straw. 



UREDINE.E FAMILY. RUSTS. 



Melampsora, Castagne. 



648. M. populina, (Jacq.) 



On Populus balsamifera, L., P. monilifera, Ait. 



649. M. salicina, Lev. 



On Salix amygdaloides, Anders, 8. longifolia, Muhl. 



650. M. farinosa, (Pers.) Schroet. 



Abundant on willow, August and September. 

 Coleosporium, Lev. 



651. C. sonchi-arvensis, (Pers.) 



On Aster cordifolius, L., A. drummondi, Lindl. 



652. C. viburni, Arthur (n. sp.) 

 On Viburnum lentago, L. 



