Phyla nodiflora (L.) Greene
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Much like no. 1 [Phyla lanceolata (Michx.) Greene], but the lvs spatulate to obovate or elliptic-obovate, generally broadest a little above the middle, mostly rounded or obtuse at the tip and narrowed to a cuneiform, petiolar or subpetiolar base, often toothed only above the middle; 2n=36. Moist soil in many habitats, especially in disturbed sites; pantropical, n. in Amer. to Va. and Calif., rarely further. May–Oct. (Lippia n.)