[ 174 ] 98 



LILIACEJB. 



Yucca angustifolia, (Sims.) Laramie rivei. July 14. 



Allium reticulatum, (Fras.) Defiles in the Wind river mountains. Aug. 12-17. 



Smilacina stellata, (Desf.) From the Laramie river to the Red Buttes. Aug. 26-31 



MELANTHACE.E? 



Zigadenus glaucus, (Nutt.) Sweet Water river. Aug. 



JUNCACE.E. 



Juncus echinctus, (Muhl.) North fork of the Platte. Sept. 4. 



COMMELYNACEJE. 



Ti-adescantia Virginica, (Linn.,) and a narrow-leaved variety. Kansas and Platte. 



CYPERACE.E. 



Carex festucacea, (Schk.) On the Kansas. June. 



C. aurea, (Nutt.) Little Blue river of the Kansas. June 22. 



C. panicea, (Linn.) Alpine region of the Wind river mountains, near perpetual snow. Aug. 15. 



C. atrata, (Linn.) With the pieceding. 



GRAMINE-E. 



Xpartina cynosurvides, (Willd.) Little Blue river of the Kansas. June 22. 

 Aristida pallens, (Pursh.) On the Platte. June 29. 

 Agrostis Michauxiana, (Trin.) Little Blue river of the Kansas. June 23. 

 Phleum alpinum, (Linn.) Alpine region of the Wind river mountains. Aug. 13-14. 

 Bromus tiliatus, (Linn.) On the Platte. June-Aug. 



Pestuca ovina, (Linn.) Alpine region of the Wind river mountains. Aug. 13-l4. 

 Pestuca nutans, (Willd.) On the Kansas. 

 Poa laxa, (Hnenke.) With the preceding. 



r. crocata, (Michx.) With the preceding. Spikelets 2-flowered. 

 P, nervata, (Willd.) On the Kansas. 

 Knekria cristata, (Pers.) Big Blue river of the Kansas, and on the Platte as high as Laramie 



river. June 20 — July 22. 

 Deschampsia ccespitosa, (Beauv.) Alpine region of the Wind river mountains. Aug. 13-14. 

 Andropegon scoparius, (Michx.) Lower Platte. 



A. nutans, (Linn.) Laramie river, North fork of the Platte. Sept. 3-4. 

 Hordeum jubatum, (Ait.) Forks of the Platte. July 2. 

 Elymus Virginicus, (Linn.) Big Blue river of the Kansas. June 20. 

 E. Canadensis, (Linn.) Little Blue river of the Kansas. June 22. 

 Beckmannia cruciformis, ( Jacq. ) North fork of the Platte. July 22. 



EQUISETACE,E. 

 Equisdum arvense, (Linn.) On a lake in the Wind river mountains. Aug. 12-17. 



FILICES. 



Jiypopeltis obtusa, (Torr. Compend. Bot. N. States, p. 380, 1826.) Aspidium obtusum, (Willd.) 

 Woodsia Perriniana, (Hook, and Grev. Icon. Fil. I. t. 68.) Physematium (Kaulf.) obtusum f 

 (Hook. Fl. Bor. Am. ii, p. 259.) On the Platte. 



