HOFFMANN: FLORA OF BERKSHIRE COUNTY. 269 



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

 banks; frequent in the soutliern part of the valley. 



R. aquatilis L., var. capiilaceus DC. White Water Crow- 

 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 Sandisfleld. 



R. circinatus Sibth. — (Batrachmm circinatum 111. Fl. ed. 2.) 



Ponds and slow streams; occasional. Lake Buel, Monterey 

 (Churchill); lagoons In the Housatonic 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; 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). 



var. PLENiFLORUS Fernald. — Vid. Rhodora, 19: 138 (1917). 

 Roadside ditches; occasional. Williamstown; Stockbridge: Al- 

 ford. 



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

 margin crenate with broad obtuse teeth; flowers double. 



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



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

 oiiunoii. 



