Stems solitary or few from a simple or weakly branched, short, mostly erect or ascending rhizome-caudex with many fibrous roots; basal lf- blades mostly 2-4 נ1-2 cm, seldom larger, ovate to broadly lanceolate, subcordate to subtruncate at base, rather bluntly toothed, normally held erect, at right angles to the ground; otherwise much like no. 14 [Senecio aureus L.]; 2n=46. Moist prairies and other open places; widespread in the w. cordillera, e. to s. Man., w. Minn., and nw. Mo. May-July. Ours is var. semicordatus (Mack. & Bush) T. M. Barkley.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.