l62 MEMOIRS OF THE NEW YORK BOTANICAL GARDEN. 



A plant 5-10 dm. high, with palmately divided leaves 1-3 dm. in 

 diameter,less reticulated than in its eastern congener, T. Caroliucnsis 

 (F. & M.) Vail. It is common on the Pacific Slope, but rare within 

 the region. 



Yellowstone Park : Lewis Lake, 1884, Tzcccdy, J02. 



* Ranunculus Purshii Richards, in Frankl. ist Journ. Ed. 2, App. 751 



(Reprint 23) [Syn. Fl. i' : 24; 111. Fl. 2: 73]. 



Resembles 7?. viuJtiJidns^ but the leaves are smaller and with 

 broader divisions, the achenes are without a turgid thickening at the 

 base and the style is more slender and longer. It grows in pools and 

 slow-running streams, up to an altitude of 2500 m. ; it is often more 

 or less hairy on the flaccid stem. 



Montana: Deer Lodge, 1895, Rydbcrg, 26^4; Bozeman, 1896, 

 Flodman, 468 ; Electric Peak, Aug. 20, 1896, Rydherg & Bessey, 

 4106; Bozeman, 1887, Tiveedy^ ^97'^ Helena, 1892, F. D. Kelsey ; 

 Belt River, 1888, R. S. Williams, 766; Little Prickly Pear Creek, 

 1883, Scribncr, j. 



Yellowstone Park : Yellowstone Lake, 1885, Tzi'ecdy, go8. 



* Ranunculus hyperboreus Rottboell, Act. Hafn. 10: 458 [Syn. 



Fl. i': 25; 111. Fl. 2: 74]. 



Resembles somewhat R. nutans^ but is much smaller and grows 

 in wet soil, not in the water. Its leaves are only 4-10 mm. in diam- 

 eter and the petals about 2 mm. long. It is found only at an alti- 

 tude of about 3000 m. 



Montana: Old Hollowtop, Pony Mts., July 9, 1897, Rydbcrg & 

 Bessey, 4iog; Anaconda, 1892, F. D. Kelsey. 



Ranunculus reptans L. Sp. PL 549 [111. Fl. 2: 75] ; Rannncidus 

 fammula reptans E. Meyer, PI. Lab. 96 [Syn. Fl. i' : 27 ; Man. 



R. M. 6; Bot. Cal. 1:7]. 



Muddy or sandy shores of lakes and rivers, up to altitude of 2500 m. 



Montana: Sun River, 1887, R. S. ]Villia»is, 68j. 



Yellowstone Park: Shoshone Lake, Aug. 10, 1897, Rydherg 

 d- Bessey y 4107 ; Yellowstone Lake, Aug. 12, 4108 ; 1885, Tzveedy^ 

 J 02. 



Ranunculus pygmaeus Wahl. Fl. Lapp. 157 [Syn. Fl. i' : 29 ; Man. 

 R. M. 7]. 



In damp places on alpine peaks. 

 Montana: Stillwater, 1887, Tweedy, igg. 



