ON THE GEOLOGY AND NATURAL HISTORY 
Verbena bipinnatifida, Nutt. Bad Lands and Yellowstone river. Some forms of 
Verbena were found near the mouth of Kansas river, and at Sargent’s bluffs, 
which are evidently hybrids, probably between V. wrticifolia and V. bracteosa. 
Numerous hybrids between the species of Verbena are not rare in the vicinity of 
St. Louis, which I have noticed in Silliman’s Journal, Jan. 1844, page 99. 
Verbena bracteosa, Michx. A very common plant about prairie dog villages on the 
Upper Missouri. 
Verbena hastata, Linn. Platte valley. 
Verbena stricta, Vent. Platte valley; July. . 
Verbena Aubletia, Linn. Along the Missouri in Kansas. 
Lippia lanceolata, Michx. Fort Leavenworth, Kansas Territory. 
Phryma Leptostachya, Linn. Not rare along the Missouri to latitude 43°. 
LABIAT &. 
Teucrium Canadense, Linn. Bad Lands, &c. 
Mentha Canadensis, Linn. All along the Missouri to the Yellowstone. 
Mentha borealis, var. glabrata. Loup fork, July 6th. 
Lycopus sinuatus, Ell., Benth. Council bluffs to above Fort Pierre. Some forms are 
very deeply pinnatifid. 
Lycopus obtusifolius, Michx., Benth. Common along the Yellowstone. Abundantly 
distinguished from the former by the larger flowers with included stamens. 
Sterile filaments reduced to mere warts and naked throat of corolla. The leaves 
are somewhat clasping with a sessile base, the lowest ones obtuse, but the upper 
ones acute and even acuminate, regularly serrate and on both sides abundantly 
glandulo-punctate. 
Tsanthus coeruleus, Michx. Fort Riley. Found by Dr. Cooper. 
Pycnanthemum lanceolatum, Pursh. Loup fork, July 31st, 1857. 
Hedeoma pulegioides, Pers. Bad Lands. 
Hedeoma hispida, Pursh. Council bluffs to Bad Lands and Yellowstone. Leaves 
strongly ribbed on the lower side, scarcely punctate, longer than the verticils ; 
teeth of punctiferous calyx spreading. 
Hedeoma Drummondi, Benth. Sandy soil on the Yellowstone river, common. Simi- 
lar to the preceding but perennial with a long tap root ; leaves nerveless, strongly 
punctate on both sides, shorter than the verticils; teeth of fructiferous calyx 
connivent. 
Salvia trichostemoides, Pursh. Fort Pierre, Bad Lands. 
Salvia Pitcheri, Torr. Collected by Dr. Cooper near Fort Riley. 
Monarda Bradburiana, Beck. Fort Pierre. 
