Subglabrous to hirsute perennial, the stems weak, often rooting at the lower nodes, 2-6 dm; lvs ovate or lanceolate, 2.5-8 נ0.5-3 cm, on petioles 0.5-2 cm; heads few on naked peduncles, the disk 5-9 mm wide, elongating conspicuously in fr; rays several, yellow, 3- toothed, 3-10 mm; receptacle narrowly conic; pappus of 1 or 2 very short awns, or none. 2n=52. Woods and moist or swampy places; tropical Amer., n. to S.C., s. Ill., and Mo. June-Oct. (S. repens)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.