MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. l6l 



i8, ^io2 and 4103; Bozeman, 1895, Rydberg; ^djj ; Bozeman, 

 1885, Tzvccdy; Deer Lodge, 1892, W.' T. Shazu ; Gallatin Co., 

 Mrs. Hodgman; Ross' Hole, 1880, Watson; Bozeman, 1883, ^Vr/Z*- 

 iier^ A. 



Yellowstone Park: Mammoth Hot Springs, 1885, Tzucedy, 

 Sgj; 1889, F. IV. Dczvart. 

 Atragene occidentalis Hornem. Hort. Hafn. 1813 : 520; Clematis 



alfina occidcntalis Gray, in Powell, Geol. Surv. Rep. Dakota, 531 



[Syn. Fl. i' : 8 ; Man. R. M. 3]. 



Among rocks. Only one specimen seen from the region. 



Montana: Helena, 1882, Tzoccdy. 



* Atragene tenuiloba (Gray) Britton, Bull. Herb. Boiss. 2: 106; 



Clematis alpi)ia var. occidentalis subvar. tenuiloba Gray, in 



Powell, Geol. Surv. Rep. Dakota, 531 ; var. tenuiloba Gray Syn. 



Fl. i^: 9. 



Like the last, but the leaflets dissected into narrow divisions ; 

 achenes hair^^ It grows among rocks, at an altitude of 2000- 

 3000 m. 



Montana: Little Belt Pass, 1895, Flodman., 26-/; Helena, 1895, 

 Rydbcrg, 2632; Lewis and Clarke Co., Mrs. Math; Helena, 1892, 

 F. D. Kclscy. 

 Myosurus minimus L. Sp. PI. 284 [Syn. Fl. i' : 19; Man. R. M. 



5; 111. Fl. 2: 71; Bot. Cal. 1:5]. 



In dried pools and muddy places. Rare in the region, but com- 

 mon further east and south. It is sometimes rather hard to distin- 

 guish it from the following. 



Montana : Silver Bow Co., 3f7-s. Moore. 



* Myosurus lepturus (Gray) Howell, Fl. N. W. Am. i: 12; My- 



ositrus apetaliis lef turns Gray, Bull. Torr. Bdt. Club, 13 : 2 [Syn. 



Fl. i': 19]. 



Differs from the preceding in the oblong achenes and elongated 

 oblong seed. In M. minimtisihe. achenes are more or less rhomboid 

 on the back and the seeds are oval. Similar situations as the pre- 

 ceding, but more common. 



Montana : Jack Creek Canon, July 16, 1896, Rydberg & Bessey, 

 4103; Great Falls, 1888, R. S. Williams 682. 



Yellowstone Park : East Fork, 1885, Txueedy, gi2. 



* Trautvetteria grandis Nutt. ; Torr. & Gray, Fl. N. Am. i : 37 



[Syn. Fl. i': 18; Bot. Cal. 2: 425] ; Actaea grandis Dietr. Syn. 

 3: 233. 



