This section is from the book "An Illustrated Flora Of The Northern United States, Canada And The British Possessions Vol2", by Nathaniel Lord Britton, Addison Brown. Also available from Amazon: An Illustrated Flora of the Northern United States, Canada and the British Possessions. 3 Volume Set..
Stem mostly stout, often purplish, 3°-7° high, glabrous or nearly so. Leaves 3-4-ternate, the lower petioled, the upper sessile or short petioled; leaflets firm in texture, ovate to obovate, 1-3-lobed above the middle or entire, dark green above, paler and waxy-resinous or glandular-pubescent beneath, their margins somewhat revolute; flowers dioecious or polygamous; filaments capillary or slightly thickened above, twice as long as the linear anthers, early drooping; achenes very short-stipitate or sessile, ridged.
Thalictrum dasycarpum Fisch. & Lall. Ind. Sem. Hort. Petrop. 8: 72. 1842.
Stout, erect, purplish, 4°-7° high, leafy, branching above, pubescent or glabrous; leaves 3-4-ternate, those of the stem sessile or short-petioled; leaflets oblong or obovate, dark green above, commonly somewhat pubescent, but neither waxy nor glandular beneath, and with 3 main apical pointed lobes; panicle compound, leafy, 1° long or more; flowers dioecious or perhaps sometimes polygamous; filaments narrow, slightly widened above; anthers linear or linear-oblong, cuspidate; achenes ovoid, glabrous or pubescent, short-stipitate, with 6-8 longitudinal wings.
In copses and woodlands, New Jersey to North Dakota, Saskatchewan, Nebraska and Arizona. Illustrated in our first edition as T. purpurascens L. June-Aug.
Glabrous, pale green and glaucous, stem erect, or assurgent at the base, 6'-2o tall. Leaves 3-4-ternate, long-petioled; leaflets firm, obovate or suborbicular, rounded at the apex, cuneate, obtuse or subcordate at the base, 4"-8" long, 3-5-lobed, the lower surface rather prominently rugose-veined; panicle narrow, its branches nearly erect; flowers dioecious; stamens 8-20; filaments slender; anthers linear, slender-pointed; achenes ovoid, nearly sessile, tapering into a short beak, thick-walled, slightly 2-edged.
In gravelly and rocky soil, Nova Scotia to Maine, New York, Manitoba, Washington, South Dakota and Colorado. Has been confused with T. occidentale A. Gray. May-July.