HOFFMANN: FLORA OF BERKSHIRE COUNTY. 269 



R. allegheniensis Britton. — Rich woods, clearings and shaded 

 banks ; frequent in the southern part of the valley. 



R. aquatilis L., var. capillaceus DC. White Water Ceow- 

 FOOT. — {Batrachium trichophyllum 111. Fl. ed. 2.) 



Ponds and slow streams; frequent. 



R. BULBOsus L. Buttercup. — Dry hillsides; frequent in the 

 valleys. Locally common in the southern tier of towns, from West 

 Stockbridge, Egremont and Sheffield to Sandisfield. 



R. circinatus Sibth. — {Batrachium circinatum II). Fl. ed. 2.) 



Ponds and slow streams; occasional. Lake Buel, Monterey 

 (Churchill); lagoons in the Housatonic River, Sheffield (Churchill). 



R. delphinifolius Torr. Yellow Watee Crowfoot. — Locally 

 common along the Housatonic River in Lenox; swamp, Stockbridge; 

 Prospect Pond, Egremont; along the Housatonic River, Sheffield 

 (Churchill). 



forma terrestris (Gray) Blake. — (var. terrestris Man. ed. 7; vid. 

 Rhodora, 15: 164, 1913.) 



Muddy shores, Lenox; mud-hole near Prospect Pond, Egremont. 



R. hispidus Michx., var. falsus Fernald. — {R. hispidus Man. ed. 

 7 in part.) 



Borders of woods; occasional in the valley. Stockbridge; New 

 Marlboro; Great Barrington; Sheffield. 



Differs from the type in having the pubescence appressed, or the 

 petioles and stems subglabrous {md. Rhodora, 22: 30, 1920). 



R. pennsylvanicus L. f. Beistly Crowfoot. — Wet shaded 

 ground; frequent. 



R. recurvatus Poir. — Moist woods; common. Altitude 1900 

 feet, Savoy. 



R. REPENS L. Creeping Buttercup. — In lawns; occasional. 

 Pittsfield; Stockbridge; Great Barrington. In a swamp, West 

 Stockbridge (Evans, Fernald and Knowlton). 



A-ar. PLENiFLORUS Fernald. — Vid. Rhodora, 19: 138 (1917). 

 Roadside ditches; occasional. Williamstown ; Stockbridge: Al- 

 ford. 



The leaflets rounded or sub-cordate (not cuneate), at the base; 

 margin crenate with broad obtuse teeth; flowers double. 



R. sceleratus L. — Swamp, Sheffield (Fernald). 



R. septentrionalis Poir. Swamp Buttercup. — Swampy woods; 

 common. 



