282 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



Montana: Pony, July 9, 1897, Rydberg & Bcssey, 4j8i ; Galla- 

 tin Co., 1886, Tzvecdy, 1048. 



Yellowstone Park: Biscuit Basin, Aug. 5, 1897, Rydberg & 

 Bessey, 4580; Yellowstone Lake, 1884, Tzveedv ; 1871,7?. Adams. 



Gayophytum ramosissimum Torr. & Gray, Fl. N. Am. i: 513 



[Trelease, Ann. Rep. Mo. Bot. Gard. 5: iii ; Man. R. M. 103; 



Bot. Cal. I : 221]. 



Common in dry or sandy soil, up to an altitude of 3000 m. 



Montana: Elk Mountains, id>g6, R/odiuan, dyS ; Spanish Basin, 

 Syy ; Indian Creek, July 21, 1897, Rydberg d- Bessey, 43^6; Span- 

 ish Basin, June 23 and 24, ^^/j, 43 J4; Pony, July 9, 437^; Boze- 

 man, 1887, Tzceedy, 2jj ; Tiger Butte, 1886, 7?. S. Williams, 483; 

 Alhambra, 1892, Kelsey ; Birch Lakes, 1883, Canby, ijj. 



Yellowstone Park: Shoshone Lake, Aug. 10, 1897, Rydberg 

 & Bessey, 4377; Biscuit Basin, Aug. 5, 4378 ; Yellowstone Falls, 

 Aug. 14, 4372; Yellowstone Lake, 1884, Tweedy; 1891, Miss 

 Cooley. 



Gayophytum caesium Xutt. ; Torr. & Gray, Fl. X. Am. i: 514 

 [Trelease, Ann. Rep. Mo. Bot. Gard. 5 : 113] ; Gayophytum race- 

 inosum Torr. & Gray, 1. c. [Man. R. M. 103 ; Bot. Cal. i : 221]. 

 In sandy soil, at altitude of 1000-2500 m. 

 Montana: Spanish Basin, June 23, 1897, Rydberg c^ Bessey, 



4582; Blackfoot River, Kitttall. 



Yellowstone Park: Tower Falls, 1885, Tzueedy, 316; Mud 



Springs, Hay den Survey. 



* Gayophytum pumilum Wats. Proc. Am. Acad. 18: 193 [Trelease, 



Ann. Rep. Mo. Bot. Gard. 5: 114]. 



Like G. caesium, but lower, generally with comparatively larger 

 leaves, and a broadl}^ oblong pod, flattened contrary to the septum .^ 

 A few specimens that apparently belong to this species were found 

 on the volcanic sand bars of Shoshone Lake ; altitude about 2500 m. 



Yellowstone Park: Shoshone Lake, Aug. 10, 1897, Rydberg 

 & Bessey, 4373. 



Gaura coccinea Pursh, Fl. Am. Sept. 733 [Torr. & Gra}^ Fl. N. Am. 



i: 518; Man. R. M. 106; 111. Fl. 2: 497]. 



On dry plains, common up to an altitude of 2000 m. 



Montana: Gallatin Co., 1887,7^. Tweedy, 232 ; Ponj^ July 6, 

 1897, Rydberg & Bessey, 438^; Cottonwood Creek, 1892, \V. Zl 



