Matricaria matricarioides (Less.) Porter
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Species Description - Branching, leafy, pineapple-scented, glabrous annual 5–40 cm; lvs 1–5 cm, 1–3 times pinnatifid, the ultimate segments short, linear or filiform; heads several or many, rayless, the disk 5–9 mm wide; invol bracts with broad hyaline margins; disk- cors 4-toothed; receptacle conic, pointed; achenes with 2 marginal and one or sometimes more rather weak ventral nerves; pappus a short crown; 2n=18. Roadsides and waste places; cordilleran region, intr. e. to the Atlantic. May–Sept. (M. discoidea; M. suaveolens (Pursh) Buchenau, not L.; Chamomilla s.)