THE BOTANY OF THE ROUTE. 
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Geum Yirginianum, Linn. 
Geum strictum, Ait. 
Geum triplorum, Pursh. 
Sanguisorba annua, Nutt. 
Chamasrhodos erecta. 
POTENTILLA NORVEGICA, Linn. 
POTENTILLA PARADOXA, Nutt. 
Potentilla Pennsylyanica, Linn. 
POTENTILLA CANADENSIS, Linil. 
Potentilla anserina, Linn. 
Potentilla arguta, Pursh. 
Fragaria vesca, Linn. 
Rubus strigosus, Michx. 
Rubus villosus, Ait. 
Rosa blanda, Ait.; Fort Clark. Neb. 
Cratasgus coccinea ; Fort Union, Neb. 
Ammania latipolia, Linn. 
Oenothera biennis, Linn. 
GUnothera albicaulis, Nutt. 
CEnothera coronopipolia, Torr. & Gray. 
CENOTHERA CiESPITOSA, Nutt. 
(Enothera serrulata, Nutt. 
Gaura coccinea, Nutt. 
Circasa lutetiana, Linn. 
Menzelia (Bartonia) ornata, Torr. & Gray. 
Echinocystis lobata, Torr. & Gray. 
Ribes hirtellum, Micbx.; fifty miles above Fort Union, Neb. 
Ribes rotundifolium, Michx. 
Ribes floridum, L’Her.; near Fort Union, Neb. 
Ribes aureum, Pursh.; one hundred miles above Fort Pierre, Neb. 
Opuntia Missouriensis, DC. 
Heuchera Richardsonii, R. Br. 
Sanicula Marylandioa, Linn. 
OSMORRHIZA LONGISTYLIS, DC. 
Cymopterus glomeratus, DC. 
Musenium divaricatum, Nutt. (Plate II.) The specimens in this collection, from various 
localities, all have smooth ovaries and fruit, and therefore belong to the typical form of the 
species. We give a figure to illustrate the plant. The variety Hoolceri, Torr. & Gray, M. 
Hookeri , Nutt, ined., and Nuttall’s M. trachyspermum and M. angustifolium appear to be all one 
species, having shorter as well as scabrous fruit, and probably distinct from M. divaricatum; 
but my present means of comparison do not suffice for determining this point. The number of 
the vittse, whether one or more in each interval, rarely affords valid characters; and Musenium 
will probably be merged in Tauschia; but this question should perhaps be deferred to a general 
recension of umbelliferous genera, which is greatly needed. The leaves of M. divaricatum are 
not all opposite, the uppermost being usually alternate. 
