An illustrated flora of the An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian ed2illustratedflo02brit Year: 1913 26. Ranunculus septentrionalis Poir. Swamp or Marsh Buttercup. Fig. 1920. Ranunculus seplenlrionalis Poir. in Lam. Encycl. 6: 125. 1804. Roots simply fibrous; plant branching, l°-3° high, glabrous, or pubescent, the later branches procum- bent and sometimes rooting at the nodes. Leaves large, petioled, 3-divided; di
An illustrated flora of the An illustrated flora of the northern United States, Canada and the British possessions : from Newfoundland to the parallel of the southern boundary of Virginia and from the Atlantic Ocean westward to the 102nd meridian ed2illustratedflo02brit Year: 1913 26. Ranunculus septentrionalis Poir. Swamp or Marsh Buttercup. Fig. 1920. Ranunculus seplenlrionalis Poir. in Lam. Encycl. 6: 125. 1804. Roots simply fibrous; plant branching, l°-3° high, glabrous, or pubescent, the later branches procum- bent and sometimes rooting at the nodes. Leaves large, petioled, 3-divided; divisions mostly stalked, usually cuneate at the base, cleft into broad lobes; lower petioles occasionally a foot long; flowers l' in diameter or more, bright yellow; petals obovate, twice the length of the spreading sepals; head of fruit globose or oval, 4' in diameter; achenes flat, strongly margined, subulate-beaked by the stout sword-shaped style which is of nearly their length and often early deciduous. Mainly in swamps and low grounds. New Brunswick to Manitoba, Georgia and Kansas. April-July. Ranunculus sicaeformis Mack. &; Bush, of Missouri and Minnesota, seems to be a hispid-pubescent race of this species. 27. Ranunculus hispidus Michx. Hispid Buttercup. Fig. 1921. .f. hispidus Michx. Fl. Bor. Am. i: 321. 1803. Usually densely villous when young, sometimes merely appressed-pubescent or glabrate when old; stems ascending or spreading, 8-2° long; plant not stoloniferous; roots a cluster of thickened fibers. Leaves pinnately 3-S-divided, the divisions ovate, oblong or obovate, narrowed or cuneate at the base, sharply cleft or lobed, usually thin; flow- ers 6'-i8' broad; petals oblong, about twice as long as the spreading sepals, entire or emarginate; head of fruit globose-oval or globose; achenes broadly oval, lenticular, narrowly margined, ab- ruptly tipped by a subulate style of about one- half their length. In dry woods and thickets. Vermont and Ontario to North Dakot
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