Monographs Details: Matricaria
Authority: Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
Description:Genus Description - Heads radiate or discoid, the rays white, pistillate and usually fertile; invol bracts dry, 2–3-seriate, not much imbricate, with ± scarious or hyaline margins; receptacle naked, hemispheric to more often conic or elongate; disk-cors yellow, 4–5-toothed; style-branches flattened, truncate, penicillate; achenes glabrous or roughened, generally nerved on the margins and ventrally, nerveless dorsally; pappus a short crown or none; herbs with alternate, pinnatifid or pinnately dissected lvs and small or middle-sized heads terminating the branches or in a corymbiform infl. 40, N. Hemisphere and S. Afr.