MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 167 



It has been mistaken for R. macrantJms on account of its large 

 flowers, but that species has a straight style. Its style character 

 would associate it with R. occidentalism from whicli it is easily distin- 

 guished by the tall habit, the broad petals, and the long and nar- 

 row divisions of the leaves. In fact the habit is most like that of R. 

 acri/ormis, from which it is distinguished by the larger flowers, the 

 longer and finer hairs and the long and slender, not much flattened, 

 strongly hooked style. 



Montana: Deer Lodge Co., Miss Emma Ware; 1892, W. T. 

 Shazv ; Helena, 1891, F. D. Kchcy (type) ; Granite, 1892, Kelsey. 



Ranunculus Pennsylvanicus L. f. Suppl. 272 [Syn. Fl. i' : 35 ; 



Man. R. M. 8; 111. Fl. 2: 80]. 



Growing along streams ; never found in the mountain regions 

 proper, but ascends the valleys up to an altitude of about 2000 m. 



Montana: East Gallatin Swamps, 1895, Flodman, 478; Boze- 

 man, 1887, Tz^'eedy, i93j Cottonwood Creek, 1892, W. T. Siiazu. 



* Ranunculus Macounii Britton, Trans. N. Y. Acad. Sci. 12 : 3 



[Syn. Fl. i': z^\ 111. Fl. 2: 80]. 



It much resembles R. Pennsylvanicus, but is generally stouter and 

 lower and with a globose head of achenes which are about 3 mm. 

 long. In R. Pennsylvanicus the head is cylindric and the achenes 

 scarcely 2 mm. long. R. Macounii grows in damp places, ascend- 

 ing into the mountains to an altitude of 2500 m. 



Montana: Madison Mts., near Indian Creek, July 22, 1897, 

 Rxdberg ct- Bessevy ^iji ; Forks of the Madison, July 26, 41 Jo; 

 Spanish Basin, June 28,^/29; iSg6, Flodman, ^80; East Gallatin 

 Swamp, ^jg; Bozeman, 1887, Tzveedy, ig^; Helena, 1888, F. D. 

 Kelsey; Custer Co., 1892, Mrs. Light; Nevada Creek, 1883, 

 Canhy. 



Yellowstone Park: Mammoth Hot Springs, Tzveedy, goj. 



* Ranunculus eremogenes Greene, Erythea, 4: 121. 



Like R. sceleratus, but leaves more dissected, stem comparatively 

 leafless, herbage light green and flowers larger. In wet places, up 

 to an altitude of 2500 m. 



Montana: Helena, 1891, P^. D. Kelsey; Emigrant Gulch, Aug. 

 23, 1897, Rydberg & Bessey, 42^ 8a. 



Yellowstone Park: Mammoth Hot Springs, 1885, Tzoeedy, 

 goi . 



