MEMOIRS OF THE NEW YORK BOTANICAL GARDEN, 



93 



Sun River, 1887, R. S. Williams^ ^30; Ft. Ellis to Yellowstone, 

 187 1, Haxdcn ; Trail Creek Divide, Big Hole Valle}^ 1880, Watson ; 

 Jocko Range, 1880, Watsoii. 



* Stenanthium occidentale A. Gray, Proc. Am. Acad. 8: 405 [Bot. 



Cal. 2: 145: Wats. Rev. 278]. 



The genus is distinguished from Zxgadciiiis by its nodding flowers, 

 and narrow glandless perianth-segments. It is only found west of 

 the Rockies. 



Montana: Deer Lodge Co., iSg2, Miss JSnuna Ware; Flathead 

 River, 1883, Canbx, 332 : Big Blackfoot River, Caiihy ; divide be- 

 tween Hell Gate and Big Blackfoot, 18S0, Watson. 



Zygadenus elegans Pursh, Fl. Am. Sept. 241 [Man. R. M. i^t^T^ ; 



111. Fl. i: 405; Wats. Rev. 278]. 



In meadows up to an altitude of 3000 m. 



Montana: East Gallatin Swamps, 1896, Flodman, j^2 ; Mill 

 Creek, Park Co., 1887,/^. Tzuccdy, 66; Jack Creek, July 15, 1897, 

 Rydbcrg cC Besscy, 38^6: Spanish Basin, June 26 and July i, 

 j8^j, J84S ; Belt Mts., 1890, R. S. Wi/liavis, 2j : Gallatin Co., 

 3f7's. A/dcrson : Bozeman, 1886, Tzi'eedy, 12^; Helena, 1892, 

 Kelsey ; Sixteen Mile Creek, 1883, Sc?-ib)icr, 28S : Madison Val- 

 ley, 1 87 1, Hay den. 



Yellowstone Park : 1884, Tzcccdv, 8g. 



Idaho: Henry's Lake, July 29, 1897, Rydberg d- Rcssey, 384^. 



Zygadenus venenosus S. Wats. Proc. Am. Acad. 14: 279 [Man. R. 



M. 353 ; 111. Fl. I : 405 ; Bot. Cal. 2 : 183]. 



In dry valleys and on hillsides up to an altitude of 2500 m. 



Montana: Spanish Basin, 1896, Flodinan^ 343 > Bridger Mts., 



June 12, iSg"], Rydbc)-g (S: Bessey^ j84g; Spanish Basin, June 26, 



3848; Great Falls, 1888, R. S. Williams, 6jo; Bozeman, 1892, 



W. T. S/iazL' : Helena, 1891, Kclscy ; Madison River, 1883, 



Scribncr, 28 g. 



Yellowstone Park : 1888, Rev. Dr. Charles H. Hall; Mam- 

 moth Hot Springs, 1885, TzL'eedy, joj ; 1889, R. W. Dezcari. 



Zygadenus paniculatus ( Nutt. ) Wats. Bot. King's Exp. 5: 344 



[Man. R. M. 354; Bot. Cal. 2: 185; Wats. Rev. 279]; 



Helonias fanicidata Nutt. Journ. Phila. Acad. 7: 57. 



On dry hillsides in the western part of the state. 



Montana: Deer Lodge, 1895, F. N. Xotestein; Grasshopper 

 Valley, Watson, 1880. 



