276 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



inflorescence ; leaves delicate, ovate-lanceolate, undulate, rounded 

 at the base. It differs from E. alpiniiDi mostly in the presence of 

 the subterranean bulblets. Rare. 



Montana: Flat Head River, 1883, Canby, ij2, in part. 



* Epilobium brevistylum Barbey ; Brewer & Wats. Bot. Cal. i: 



220 [Trelease, ]Mon. 100]. 



The general aspect of the plant is exceedingly like that of a more 

 simple E. adenocaulon, but the leaves are thinner, the coma dingy 

 and the propagation is by subterranean bulblets. In swampy ground,, 

 at an altitude of 2000-3000 m. 



Montana: Helena, 1894, E. Douglas; Flat Head River, 1883, 

 Canby, ij2, in part. 



Yellowstone Park: Shoshone Lake, Aug. 10, 1897, Eydbo-g 

 & Besscy, 4550 and 4552 ; East De Lacy's Creek, 755/. 



* Epilobium Halleanum Hausskn. Monog. 261 [Trelease, Mon. loi] . 



Distinguished from the last by its sessile, often clasping, decurrent 

 leaves. 



Montana: Spanish Basin, 1896, Flodman, 6yj. 



Idaho: Henry's Lake, July 31, 1897, Rydberg & Bcssey, 4361. 



* Epilobium Drummondii Hausskn. Monog. 271; [Trelease, Mon. 

 102]. 



Characterized bv its strict stem, narrowly lanceolate subsessile 

 leaves which are rounded at the base, but not decurrent. In rich 

 meadows, at an altitude of 2000-2500 m. 



Montana: Spanish Basin, July i, 1897, Rydberg- ct Bcssey ^ 

 455S; Belt Mts., 1885, F. W. Anderson, 132; Jefferson City, 1883,. 

 Scribner, 36a. 



Yellowstone Park: Soda Butte Creek, 1885, Ticeedy, j20. 



* Epilobium Drummondii latiusculum. 



Leaves broader, ovate-lanceolate, more prominently dentate ; stem 

 often reddish, never pale as in the species. 



Dr. Trelease, to whom the specimens were sent, named it E. 

 Driininiondij, but added : " one of the forms towards saximontaniunr 

 It looks quite different from the typical E. Driimniondii and may be 

 a distinct species or a hybrid. It was growing along a brook with 

 E. Halleanuni, which it also approaches. 



Idaho: Henry's Lake, July 31, 1897, Rydberg & Besscy, 755^ 

 and 4j6o. 



