HOFFMANN: FLORA OF BERKSHIRE COUNTY. 269 
R. allegheniensis Britton. — Rich woods, clearings and shaded 
banks; freciuent in the southern part of the valley. 
R. aquatilis L., var. capillaceus DC. White Water Crow- 
foot. — {Bairachium trichojihyUum 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. — {Bairachium circinahim 111. Fl. ed. 2.) 
Ponds and slow streams; occasional. Lake Buel, Monterey 
(Churchill); lagoons in the Hoiisatonic River, Sheffield (Churchill). 
R. delphinifolius Torr. Yellow Water 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 {vid. Rhodora, 22: 30, 1920). 
R. pennsylvanicus L. f. Bristly Crowfoot. — Wet shaded 
ground; frecnient. 
R. recurvatus Poir. — Moist woods; connnon. 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). 
var. pleniflorus Fernald. — Vid. Rhodora, 19: 138 (1917). 
Roadside ditches; occasional. Williamstown; Stockbridge: .\I- 
ford. 
The leaflets rounded or sub-cordate (not cuneate), at the base; 
margin crenate with l)road obtuse teeth; flowers d()ul)lf. 
R. sceleratus L. —Swamp, Sheffield (Fernald). 
R. septentrionalis Poir. Swamp Buttkucup. — Swampy woods; 
coinmoii. 
