SUPPLEMENT TO THE FLORA OF MONTANA. 45 



acatilescent and fewer flowered, while it grows only in alpine and 

 subalpine situations. It also grows isolated, while cicgans in the 

 lower valleys is found mainly in clumps.. It appears to be the 

 northern counterpart of Z. Color adocnsis, Rydberg, from which it 

 differs in its smaller size, wider and shorter bracts, different perianth 

 segments and smaller and narrower capsule. It appears to inter- 

 grade with Z. clegans at intermediate situations, but its easily recog- 

 nized characters and different altitude clearly separate it here. 



Spanish Peaks, 9000 ft., July 20, 1901, Jacob Vogel ; Sperry Gla- 

 cier, 8000 ft., Sept. i, 1903; Head of Cottonwood Cr., Tobacco Root 

 Range, 9000 ft., Aug. 10, 1902. 



Zygadenus gramineus, Rydberg, Bull. Torr. Bot. Club, 27: 535. 

 A segregate with the next from Z. vcncnosus, Wats. 



Zygadenus intermedius, Rydberg, 1. c. A segregate from the 

 next. 



Z \gadcnns I'cncnosits, Wats. All the Montana specimens of 

 this species have been separated under the two species last men- 

 tioned above. 



ORCHIDACE^:. 



Corallorhiza striata, Lin ell. 



Columbia Falls, June 21, 1894, R S. Williams, 1033; Hall's Peak, 

 Mission Mts., June 20, 1902, M. J. Elrod ; Garnet, June 15, 1901, Mrs. 

 E. W. Scheuber. 



Habenaria multiflora, (Rydb.) ; Pipcria mnltiflora, Rydberg. 

 Bull. Torr. Bot. Club, 28: 638. A segregate from H. cicgans, 

 Boland. 



SALICACE^. 



Populus acuminata, Rydberg, Bull. Torr. Bot. Club, 20:46, 

 Leaves ovate-acuminate ; petioles 3-6 cm. long : lateral nerves about 

 8. Owing to the frequent intergrading of the species of Populus 

 and the intermediate characters of this species between dcltoidcs and 

 angustifolia and a related intergrade of balsamifcra and angustifolia, 

 ' it is doubtful if this be more than a hybrid and further study 

 is necessary to decide. 



Yellowstone, 1878, V. Havard (Gray Herb.) ; Big Horn Mts., 

 Aug., 1859, F - v - Hayden (Gray Herb.) ; Big Timber, July 13, 1901. 



