BOTANY OF THE ROUTE. 41 



NASTURTIUM PALUSTEE, DC. 



NASTURTIUM OBTUSUM, Nutt. 



NASTURTIUM LIMOSUM, Nutt. 



ARABIS HIRSUTA, Scop. 



SYSIMBRIUM CANESCENS, Nutt. A nearly glabrous variety. 



ERYSIMUM CHEIRANTHOIDES, Linn. 



ERYSIMUM ASPERUM, DC. 



STANLEYA INTEGRIFOLIA, James. Without much doubt this is a mere state of S. pinnatifida. 



STANLEYA PINNATIFIDA, Nutt. 



SINAPIS NIGRA, Linn. (Introduced.) 



CAPSELLA BURSA-PASTORIS, DC. 



LEPIDIUM YIRGINICUM, Linn. 



LEPIDIUM INTERMEDIUM, Gray, PI. Wright. 



DRABA MICRANTHA, Nutt. 



CLEOME INTEGRIFOLIA, Torr. & Gray. 



VIOLA CUCULLATA, Ait. 



YIOLA PALMATA, Linn. 



VIOLA CANADENSIS, Linn. 



ELODEA VIRGINICA, Nutt. 



MCEHRINGIA LATERIFLORA, Fenzl. 



CERASTIUM ARVENSE, Linn. 



CERASTIUM MUTANS, Raf. 



MALVASTRUM COCCINEUM, Gray. One hundred miles above Fort Pierre. 



LINUM PERENNE, Linn. 



LlNUM RIGIDUM, Pursll. 



GERANIUM MACULATUM, Linn. 



OXALIS VIOLACEA, Linn. 



OXALIS CORNICULATA, Linn. 



ZANTHOXYLUM AMERICANUM, Mill. 



RHUS TOXICODENDRON, Linn. 



RHUS AROMATICA, Ait. White river, Nebraska. 



AMPELOPSIS QUINQUEFOLIA, Michx. 



CEANOTHUS OVALIS, Bigel., var. 



STAPHYLEA TRIFOLIA, Linn. 



NEGUNDO ACEROIDES, Moench. 



POLYGALA ALBA, Nutt. 



VICIA AMERICANA, Muhl. 

 LATHYRUS LINEARIS, Nutt. 

 LATHYRUS POLYMORPHUS, Nutt, 

 LATHYRUS VENOSUS, Muhl. 

 AMPHICARPA MONOICA, Ell. 

 GLYCIRRHIZA LEPIDOTA, Nutt. 



PSORALEA LANCEOLATA, Pursll. 



PSORALEA ARGOPHYLLA, Pursh, and var. DECUBENS. Less silvery and silky-hirsute; sterns 

 slender, decumbent or diffuse; stipules mostly near equalling the short petiole j leaflets ellip- 

 Gt 



