Bellis perennis L.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Fibrous-rooted, scapose perennial, ± spreading-hairy; lf-blades elliptic or ovate to orbicular, dentate or denticulate, to 4 × 2 cm, narrowed to a margined petiole of equal or greater length; scape 5–15 cm; disk 5–10 mm wide; rays numerous, white to pink, to 1 cm; 2n=18. A weed in lawns and waste places, intr. from n. Europe and ± established throughout n. U.S. Apr.–Nov.