THE BOTANY OF THE EOUTE. 
39 
Geum Virginianum, Linn. 
Geum steictum, Ait. 
Geum tbifloeum, Pursh. 
Sanguisorba annua, Nutt. 
Cham^bhodos erecta. 
POTENTILLA NORVEGICA, Linn. 
POTENTILLA PARADOXA, Nutt. 
PoTENTiLLA Pennsylvanica, Linn. 
POTENTILLA CANADENSIS, Linn. 
POTENTILLA ANSERINA, Linn. 
POTENTILLA AEGUTA, Pursh. 
Feagabia vesca, Linn. 
EUBUS STRIGOSUS, Michx. 
Rubus villosus. Ait. 
Rosa blanda, Ait.; Fort Clark. Neb. 
Ceatjegus coccinea ; Fort Union, Neb. 
Ammania latifolia. Linn. 
(Enothera biennis, Linn. 
OENOTHERA ALBICAULIS, Nutt. 
(Enothera coronopifolia, Torr. & Gray. 
OENOTHERA CJDSPITOSA, Nutt. 
OENOTHERA SERRULATA, Nutt. 
Gaura coccinea, Nutt. 
CiRCiEA lutetiana. Linn. 
Menzelia (Bartonia) ornata, Torr. & Gray. 
EcHiNOCYSTis LOBATA, Torr. & Gray. 
Ribes hirtellum, Michx. ; fifty miles above Fort Union, Neb. 
RiBES ROTUNDIFOLIUM, Michx, 
RiBES FLOBIDUM, 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 IL) 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 Hookeri, Torr. & Gray, 31. 
Hookeri, Nutt. ined., and Nuttall's ilf. trachyspermum and 31. angustifolium appear to be all one 
species, having shorter as well as scabrous fruit, and probably distinct from 31. divaricatum; 
but my present means of comparison do not suffice for determining this point. The number of 
the vittce, whether one or more in each interval, rarely aflbrds valid characters; and 3'Iusenium 
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 31. divaricatum are 
not all opposite, the uppermost being usually alternate. 
