MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 283 



Shazv ; Gallatin Co., Mrs. Hodgman ; Lower Missouri Falls, 1885, 

 R. S. Williams, 2yi ; Beaver Head Cafion, 1888, Tzcccdy, g8 ; 

 Bozeman, 1886, lo^y; Cinnabar, 1884, jj; Custer Co., 1897, J/r5. 

 Light; Belt Mountains, 1882, Canby ; Madison River, 1883, Scrib- 

 ner, j8d ; Hell Gate Caiion, 1880, Watson. 



* Gaura glabra Lehm. ; Hook. Fl. Bor. Am. i: 209; Gaura coc- 



cinca glabra Torr. «& Gray, Fl. N. Am. i : 518. 



Like G. coccinea, but glabrous ; bark of the older stems yellow- 

 ish white and shreddy ; bracts longer and linear-subulate ; flowers 

 generally dark blood-red, but specimens with light pink flowers 

 are sometimes met with. On dry plains and hills, preferring sandy 

 soil. 



Montana: Alhambra, 1887, Kelsey ; Pony, July 6, 1897, Ryd- 

 berg & Bessey, 45^0. 

 Gaura parviflora Dougl. ; Lehm. in Hook. Fl. Bor. Am. i : 208 



[Torr. & Gray, Fl. N. Am. i : 519 ; Man. R. M. 106 ; 111. Fl. 2 : 



496; Bot. Cal. I : 234]. 



In rich soil on bottom lands and prairies, up to an altitude of per- 

 haps 1500 m. 



Montana: Great Falls, 1886, 7?, ^\ Williams, ^go; Custer Co., 

 1892, Mrs. Light; Crow Creek, 1883, Scribner, ^8c. 

 Circaea Pacifica Aschers. & Magn. Bot. Zeit. 29: 392 [Man. R. 



M. 106; Bot. Cal. I : 234]. 



Among bushes, in rich soil. 



Montana: Prickly Pear Canon, 1887, R. S. Williams, 6jo; 

 Upper Marias Pass, 1883, Canby, ij8. 



* Circaea alpina L. Sp. PI. 9 [Torr. & Gray, Fl. N. Am. i: 527; 



111. Fl. 2: 500]. 



It is ditflcult to distinguish between this and the preceding, and 

 they may be but forms of one variable species. The eastern speci- 

 mens seem to be easily separated from those of the Pacific Coast, 

 but in the Rocky Mountain region the}" seem to run more or less to- 

 gether. C. alpina is generally a much smaller plant with more 

 sharpl}^ dentate leaves. 



Montana: Columbia Falls, Mrs. J. J. Kennedy, 41. 



HALORAGIDACEAE. 



Myriophyllum spicatum L. Sp, PI. 992 [Torr. & Gray, Fl. N. Am. 

 i: 529; Man. R. M. 99; 111. Fl. 2: 503; Bot. Cal. i: 215]. 

 In lakes and ponds, up to an altitude of 2000 m. 



