288 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



Pseudocymopterus bipinnatus (Wats.) Coulter & Rose, Rev. N. A. 



Umb. 75; Cxnioptcnis hipinnattis Wats. Proc. Am. Acad. 20: 



368 [Man. R. M. 119]. 



Dry hills, at an altitude of 1500-2500 m. 



Montana: Pole Creek, July 4, 1897, Rydherg & Bessey, 4628; 

 Cedar Mountain, July 16, 462g and 4630; Helena, 1891, S. A. 

 Aferritt ^nd F. D. Kehcy ; Madison Co., 1888, Tzuccdy, i; Mill 

 Creek, 1887, 212; Silver Bow Co., Mrs. Jennie Moore; N. Pac. 

 R. R., 1882, Tzueedy,2gi ; Mt. Helena, 1883, Canby, 148; Shields 

 River, iSS^, Scrtbner, 66c; Bannock City, 1880, Watson; Virginia 

 City, 187 1, Hay den Survey. 



Musineon divaricatum (Pursh) Nutt. ; Torr. & Gray, Fl. N. Am. 

 I : 642 [111. Fl. 2 : 527 ; Man. R. M. 114: Coulter & Rose, Rev. 

 no] : Seseli divaricatum Pursh, Fl. Am. Sept. 732. 

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

 Montana : Upper Missouri, JVtittall. 



Musineon Hookeri Nutt.: Torr. & Gray, Fl. N. Am. i: 64; 

 Musenium divaricatum Hookeri Torr. & Gray, 1. c. [Man. R. M. 



115]- 



Hillsides, up to an altitude of 2500 m. 



Montana: Pole Creek, July 4, 1897, Rydberg- d- Bessey, 4613; 

 Lewis and Clarke Co., Mrs. Muth and Mrs. Murphy : Great Falls, 

 1885, F. W. Anderson, 166; Madison Co., 1885, Tzi'cedy, ijg; 

 Great Falls, 1889, R. S. Williams, 16; Helena, 1891, Kclsey ; Gard- 

 iner, 1885, Ttt'ccdy, 8ss; Mt. Helena, 1883, Canby, 154; Beaver 

 Head Co. and Grasshopper Valley, 1880, Watson. 



* Musineon vaginatum. 



Stem less than i dm. high, from a thick perennial root, glabrous, 

 striate, more or less purple-tinged, 2-3-leaved ; basal leaves with 

 petioles about 5 cm. long, twice or thrice ternate with stalked 

 divisions (stalk of the terminal one longest), glabrous; divisions 

 divided into linear or linear-oblong obtuse segments about 5 mm. 

 long ; stem leaves similar, short-petioled, and with a very conspicuous 

 purple and scarious-margined sheath; umbel 1-2 cm. in diameter, 

 with several ravs ; involucre none ; involucels of linear bracts 

 nearly as long as the pedicels ; sepals evident ; petals white or some- 

 times yellowish ; mature fruit not seen ; young fruit with strong 

 angles but no wings, a little compressed laterally ; oil-tubes ap- 

 parently 3 in the intervals ; seed-face plane ; stylopodium depressed. 



