Lax annual 2-4 dm, strigose throughout; lower lvs petioled, often pinnately compound, the upper sessile and clasping, coarsely pinnately lobed, the lobes 3-11, triangular or oblong, often falcate, sharply acute; cymes secund, 6-20-fld; cor commonly blue, broadly campanulate or subrotate, 5-13 mm wide, its lobes conspicuously fringed, glabrous; filaments villous below the middle; cor with very small appendages in the tube; ovules 4; seeds 2-4, 1.5-3 mm; 2n=18. Rich moist woods; e. Pa. to S.C. and Ga., w. to se. Ont., n. Ind., e.c. Ill., e. Mo., and Ala. Apr.-June.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.