[ 174 ] 90 



LOASACE.E. 



Mentzelia nuda, (Torr. and Gr.) North fork of the Platte. July 14. 



GROSSULACEyE. 



Ribes cereum, (Lindl.) Sweet Water of the Platte. August 2-4. 



R. lacustre, (Poir.) With the preceding, fi leaves deeply lobed. R. echinatum, (Dougl.) Per- 

 haps a distinct species. 

 R. irriguum, (Dougl.) With the preceding. 



CACTACE.E. 



Opuntia Misso'jricnsls, (DC.) Forks of the Platte. July 2. 



CRASSULACEiE. 

 Sedum rhodiola, (DC.) On a lake in Wind river mountains. August 12-17. 



UMBELLIFER^E. 



Heracleum lanatum, (Michx. ?) Leaves only. The leaves are more glabrous than in the ordinary 



form of the plant. Alpine region of the Wind river mountains. 

 Folylacnia Nuttallii, (DC.) On the Kansas. June 20. 

 Slum? incisum, n. sp. Stemsulcate; segments of the leaves distant, deeply incised or pinnatified; 



the lower teeth or divisions often elongated and linear. North fork of the Platte. July 12. 

 Edosmia Gardineri, (Torr. andGr.) Without fruit. 

 Cicuta maculata, (Linn.) Lower Platte. 

 Musenium tenuifolium, (Nutt) Alpine region of the Wind river mountains. 



CORNACEJ3. 



Cornus sfolonifera, (Michx.) On a lake in the "Wind river mountains. August 12-17. 

 C. circinafa, (L'Her.) On the Platte. 



CAPRIFOLIACE.E. 

 Symphori carpus occidentalis, (R. Brown.) North fork of the Platte. July 10, August 31. 

 5. vulgaris, (Michx.) Defiles of the Wind river mountains. August 13-14. 



RUBIACE^J. 

 Galium boreale, (Linn.) Upper part of the North fork of the Platte. August 12-31. 



COMPOSITE. 



Vernoniafasciculata, (Michx.) On the Platte. 



Liatris scariosa, (Willd.) Lower part of the Platte. September 27. 



L. spicata, (Willd.) North fork of the Platte. September 4. 



L. squarrosa, va>\ intermedia, (DC.) A small form of the plant. On the Platte. 



L. punctata, (Hook.) Black hills of the Platte. August 29. 



Brickellia grandijiora, (Nutt.) North fork of the Platte. 



Aster integr if alius, (Nutt. ) Base of the Wind river mountains. 



A. adscendens, (Lindl.) Wind river mountains. Var. Fremontii, with the preceding. The 



highest summits to the limits of perpetual snow. August 16. 

 A. loevis, (Linn.) North fork of the Platte. 



A. Novi-Be/gii, (Linn.) Sweet Water of the Platte. August 22. . 



A. cordifolius, (Linn.) Lower Platte. 

 A. multiflorus, (1 (Torr. and Gr.) Upper Platte, &c. 

 A.falcatus, (Lindl.) Black hills to the Sweet Water. July 30, August. 

 A. laxifolius, (Nees.) On the Platte, from its mouth to the forks. September 12-30. 



