Fl. Amer. Sept. 2: 388. 1814, not T. pubescens Schleicher ex de Candolle 1817
Phenology: Flowering late spring–summer (mid Jun-early Aug).
Habitat: Full sun to deep shade, rich woods, low thickets, swamps, wet meadows, and stream banks
Elevation: 15-1500 m
St. Pierre and Miquelon, N.B., Nfld., N.S., Ont., P.E.I., Que., Ala., Ark., Conn., Del., D.C., Ga., Ill., Ind., Ky., Maine, Md., Mass., Mich., Miss., N.H., N.J., N.Y., N.C., Ohio, Pa., R.I., S.C., Tenn., Vt., Va., W.Va.
The ovaries change from white to purplish, becoming light green, then darker green, and finally brown as fruits mature.
Because of the polymorphic nature of Thalictrum pubescens, a proliferation of names for minor morphologic variants has resulted. Field studies (M. Park 1992) have shown that too much morphologic variation occurs within populations to support the recognition of previously described taxa. Plants in New England and northeastern Canada often have a corymbose inflorescence and longer filaments and achene beaks.
This species is often incorrectly treated in floras as T. polygamum Sprengel, an invalid name.
The Iroquois used Thalictrum pubescens medicinally a a wash for head and neck, to stop nosebleeds, and to treat gall (D. E. Moerman 1986).