BOTANY OF THE ROUTE. 
43 
Geum Virginianum, Linn. 
Geuh strictum, Ait. 
Geum triflorum, Pursh. 
Sanguisorba annua, Nutt. 
Cham^erhodos erecta. 
POTENTILLA NORVEGICA, Linn. 
POTENTILLA PARADOXA, Nutt. 
POTENTILLA PeNNSYLVANICA, Linn. 
Potentilla Canadensis, Linn. 
POTENTILLA ANSERINA, Linn. 
Potentilla arguta, Pursh. 
Fragaria vesga, Linn. 
Rubus strigosus, Michx. 
Rubus villosus, Ait. 
Rosa blanda, Ait.; Fort Clark, Neb. 
Crataegus coccinea; Fort Union, Neb. 
Ammania latifolia, Linn. 
(Enothera biennis, Linn. 
Oenothera albicaulis, Nutt. 
(Enothera coronopifolia. Torr. & Gray. 
(Enothera c^spitosa, Nutt. 
(Enothera serrulata, Nutt. 
Gaura coccinea, Nutt. 
ClRCiEA LUTETIANA, Linn. 
Mentzelia (Bartonia) ornata, Torr. & Gray. 
Echinocystis lobata, Torr. & Gray. 
Ribes hirtellum, Michx.; 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 Marylandica, 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 JSookeri, 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 vittae, 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 ol unbelliferous genera, which is greatly needed. The leaves of M. divaricatum are 
not all opposite, the uppermost being usually alternate. 
