PLANTS OF IOWA 55 



638. E. pliysalidis, (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 Sanicula 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. 



UROCYSTIS, Rabenh. 



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



On Elymus robustus, S. & S., E. canadensis, and Bromus 

 ciliatus, L. 



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



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



646. U. colchici, (Schlecht) Rabenh. 

 On Polygonatum giganteum, Diet. 



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



On Elymus canadensis, L., and rye straw. 



UBEDINKffi FAMILY. EUSTS. 



MELAMPSORA, Castagne. 



648. M. populina, (Jacq.) 



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



649. M. salicina, Lev. 



On Salix amygdaloides, Anders, S. 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. 



