CATALOGUE OF PLANTS. 



Class I.— EXOGENOUS PLANTS. 



RANUNCULACEJE. 



Clematis Virginiana, (Linn. ) Valley of the Platte. June, July. 



Ranunculus scelcatus, (Linn.) Valley of the Sweet Water river. August 1 8- 20. 



R. cymbalaria, (Pursh.) Upper Platte. July 31, August. 



Aquilegia coerulea, (Torr. ) Wind river mountains. August 13-16. 



Aetata rubra, (Bigel.) Upper Platte. August 26-31. 



Thalictrum Cornuti, (Linn.) Platte. 



T. megacarpum, n. sp. Upper Platte. August 26-31. 



MENISPERMACE.E. 

 Menispermum Canadense, (Linn. ) Leaves only. On the Platte. 



BERBERIDACEJE. 

 Berberis aquifolium, (Torr. and Gr. ) Wind river mountains. August 13-16. 



PAPAVERACEJE. 



Argemone Mexicana /? albiflnra, (DC.) Forks of the Platte. July 2. 



CRUCIFERiE. 

 Nasturtium palustre, (DC .) Black hills of the Platte. July 26, August. 

 Erysimum cheiranthoides, (Linn.) Black hills. July 23. 

 E. asperum, (Nutt.) South fork of the Platte. July 4. 

 Pachypodium, (Thelypodium, Endl. Gen. p. 876,) integrifolium, (Nutt.) North fork of the 



Platte. September 4. Var. with longer pods. With the preceding. 

 Vesicaria didymocarpa, (Hook.) Leaves only. North fork of the Platte, above the Red Butte3. 



July 30. 

 Braya, n. sp. Wind river mountains, near the limits of perpetual snow. August 1 5. 

 Lepidium ruderale, (Linn.) On the Platte. June 29. 



CAPPARIDACE^E. 



Cleome integrifolia, (Torr. and Gr. ) From the Lower Platte nearly to the mountains. June 29 t 



July 2, August 21. 

 Polanisia trachysperma, (Torr. and Gr.) Black hills of the Platte. July 23. 



POLYGALACE^E. 



Polygala alba, (Nutt.) P. Beyrichii, (Torr- and Gr.) Forks of the Platte. July 2. 



DROSERACE.E. 

 Parnassia fimbriata, (Banks. ) Little Sandy creek, defiles of the Wind river mountains. Aug. 8. 



CARYOPHYLLACEiE. 



Arenavia congesta, (Nutt.) Highest parts of the Wind river mountains. August 13-16. 



Silene Drummondii, (Hook.) With the preceding. 



S. acaulis, (Linn.) Wind river mountains, at the limits of perpetual snow. 



