42 BOTANY OF THE ROUTE. 



tical or narrowly oblong, (l-l-i inch long, J-J inch wide,) some glabrate above, flowers smaller. 

 Little Muddy river, August 10. This is perhaps the P. campesfris, Nutt., which I have never 

 seen; but the leaves of that species are said to be only one or two lines broad. Fruiting spe- 

 cimens are desirable. 



PSOEALEA CUSPIDATA, Pursh. 

 PSORALEA ESCTTLENTA, Pursh. 



Amorpha fruticosa, Linn. 

 Amorpha nana, Nutt., {mycrophylla, Pursh.) 

 Amorpua canescens, Nutt. 

 Petalostemon violacepm, Michx. 

 Petalostemon candidum, Michx. 

 Trifolium stoloniferum, Muhl. 

 Trifolium pratense, Linn. 

 Trifolium hepens, Linn. 



HOSACKIA PURSHIANA, Bcnth. 



Astragalus caryocarpus, Ker. 



Astragalus gracilis, Nutt. 



Astragalus Missouriensis, Nutt. 



Astragalus adsurgens. Pall., var. robustior. Hook. Astragalus siriatiis, Nutt. in Torr. and 

 Gray, FL 1, p. 230. Apparently very abundant on the Upper Missouri, the specimens in flower 

 only; fruit not seen. This is evidently only a larger form of Hooker's A. adsurgens, which 

 seems to be that of Pallas also. The lower stipules cohere more or less opposite the petiole, 

 but the upper ones are distinct. 



Astragalus Canadensis, Linn. ? in flower only. 



Astragalus racemosus, Pursh. 



Astragalus bisulcatus. Gray. (Plate I.) PJiaca bisulcata, Hook. Fl. Bor.-Am., 1, p. 1-45, 

 Specimens with mature truit, of which I give a figure. 



Astragalus pectinatus, Dougl. Phaca 2xctinata, Hook., 1. c. 54. The ripe fruit is much 

 blunter and thicker than in Hooker's figure. 



Astragalus filifolius, (Plate I.) Phaca longi/olia, Nutt.; Psoralea longifoUa, Pursh. The 

 name longifolms being preoccupied in Astragalus, this may take the more characteristic name 

 of A. filifolius. 



Oxytropis Lamberti, Pursh. Various forms, doubtless including more than one of Nuttall's 

 species. 



Oxytropis splendens, Dougl. A most elegant plant, with its crowded silvery silky-villous 

 foliage and spikes, and deep blue corollas. It was gathered on the Chippewa river. 



Desmodium nudiflorum, DC. 



Lespedeza hirta. Ell. 



LUPINUS PUSILLUS. Pursh. 



Lupinus perennis, Linn. 



SOPHORA SERICEA, Nutt. 



Thermopsis rhombifolia, Nutt. 

 Gleditschia triacanthos, Linn. 



SCHRANKIA UNCINATA, Willd. 



Cerasus Virginiana, DC. 



