MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 155 



Montana: Lima, 1895, Rydbcrg, 2644; Beaver Head Co., 

 Sweetwater Basin, 1888, Tzueedy, 14S; Bear Gulch, 1887, /po,- 

 Terminus, 1880, Watson. 



Aquilegia formosa Fischer ; DC. Prod, i : 50 [Syn. Fl. i' : 44 : Man. 



R. M. 10]. 



Next to A. jlavescens this is the most common columbine in Mon- 

 tana, growing in woods at an altitude of 1000-2500 m. 



Montana: Lima, 1895, Rydherg 264^ ; Spanish Basin, 1896, 

 Flodman, 4^2; Jack Creek, July 15, 1897, Rydberg & Bcssey, 40J0. 



Delphinium scopulorum Gray, PI. Wright. 2: 9 [Syn. Fl. i' : 11 ; 



Man. R. M. 11 ; Bot. Cal. 2: 428]. 



The t3^pical D. scopulortiui is a more southern plant, growing from 

 New Mexico and Arizona to Utah and Nevada. I refer the follow- 

 ing specimens to it doubtfully ; they have the deeply dissected leaves 

 of D. scofiiloruin but are taller and more strict, approaching the 

 next species in habit : 



Montana: Lima, 1895, Rydberg, 264-/. ( ?) ; Beaver Head Co., 

 1888, Tzvecdy, 14s (?). 



* Delphinium glaucum Wats. Bot. Cal. 2 : 427 ; Delphinium scopu- 



lonini oJaiienni Gray, Syn. Fl. i' : 47. 



Nearest related to D. scopuloriiin, but much taller, often 1-2 m. 

 high ; its leaves are larger, glaucous-green, less dissected and with 

 broad segments. It is the most common species in Montana, grow- 

 ing in rich soil, at an altitude of 1500-2500 m. ; it is poisonous to 

 cattle and together w'ith D. bicolor has caused considerable loss to 

 cattlemen. 



Montana: Bozeman, 1889, J//'5. y4A/£';'5(>;/; Spanish Basin, 1896, 

 Flodnian, 4jj ; Bozeman, 1895, Rydberg, 2648; Mill Creek, 1887, 

 Tzveedy, 1S4; Sixteen Mile Creek, 1883, Scribncr, 8. 



Yellowstone Park : 1884, Tzueedy, jo6. 



Idaho: Henry's Lake, July 31, 1896, Rydberg (£■ Bessey, 40JC). 



* Delphinium glaucescens. 



Stems from a thick perennial caudex, 3-5 dm. high, somewhat 

 angled, finely pubescent especially above, or in age glabrate, more 

 or less glaucous; leaves rather firm, finely puberulent, more or less 

 glaucous, orbicular in outline, divided to near the base into 5-8 cuneate 

 divisions, these generally deeply 3-clef t ; raceme simple, rather 

 short ; lower bracts linear, about 2 cm. long and exceeding the flow- 

 ers, the upper subulate ; pedicels and flow^ers densely and finely 



