248 METASPERMAE OF THE MINNESOTA VALLEY. 
Europe; W. Asia; China; Himalayas; Australia; almost 
cosmopolitan. 
North America: Greenland to Brit. Col. in Can.; U. 
S. across the continent; mts. of Utah to 6,000 ft. alt. 
Minn. valley: Abundant throughout in ponds, lakes 
and sluggish streams. 
HerRB.: Ballard 170, Shakopee; Sheldon 317, Madison 
Lake; Sheldon 1152, New Ulm; Sheldon 1136, Springfield; Shel- 
don 722, Sleepy Eye; Ballard 277, Jordan; Holzinger 5, Lake 
Winona; Huntington 1, Rock Co.; Sandberg 19, Cannon Falls; 
Herb. Wickersheim 8, Lake Stay, Lincoln Co.; Herb. Moyer 8, 
Granite Falls. 
Ranunculus aquatilis Linn. var. caespitosus DC. Prodr. 
I, 26 (1824). 
R. hydrocharis caespitosus HIERN. Seem. Journ. Bot. LX, 65 (1871). 
Wats. and Coult., Gray’s Man. 6 ed. 41; Wats., Bibl. Ind. I, 17; Mac., 
. FL Can. I, 16. 
North America: Ont. to Ill., Minn., Dak. and Sas- 
katchewan. 
Minn. valley: S.and 8. W. districts; pools of stagnant 
water and rooting in the mud. 
HeERB.: Sheldon 818, Cottonwood river, near Sleepy 
Eye; Sheldon 1184, Cottonwood river, Springfield; Sheldon 317, 
Duck lake, Blue Earth Co.; Sheldon 354, Lake Madison, Blue 
Earth Co.; Sheldon 435, Lake Elysian, Waseca Co.; Sheldon 
1452, Pipestone. 
Ranunculus circinnatus Sisto. Fl. Oxon. (1794). 
R. aquatilis LINN. var. stagnatilis DC. Prodr. I, 26 (1824). 
R. divaricatus GRAY, Pl. Wright, I1, 8 (1852). 
Wats. and Coult., Gray’s Man. 6 ed. 40; Upham, Fl]. Minn. 18; Coult , 
Fl. Colo. 6; Mac., Fl. Can. I, 16; II, 296; Wats, Bibl. Ind. I, 17; Wats., 
King Exp. 6; Hook., Fl). Gt. Brit. 6; Nym., Fl. Eur.; Hart., Fl. Scand. I, 
168; Webb., Appx. Neb. 30. 
W. Europe (local). 
North America: Man. to Rocky mts. and Brit. Col.; 
S. to Vt., Maine, Iowa, Dak., Neb., Colo., Nev. and Oregon. 
Minn. valley; Reported from Mankato and Alexandria; 
probably local in the forest lakes of the valley. 
Hers.: Bailey 318, Vermilion lake. 
THALICTRUM Linn. Gen. 461 (1787). 
Physocarpum SpPacH, Suit. Buff. VII, 237 (1839). 
Tripterium Spacu, 1. c. (1839). 
Baillon, Hist. Pl. I, 87; Benth. and Hook., Gen. Pl. I, 4; Engler and 
