• Authority

    Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.

  • Family


  • Scientific Name


  • Description

    Genus Description - Dioecious; fertile heads with ± numerous tubular-filiform pistillate fls; sterile heads with ± numerous seemingly perfect but functionally staminate fls, the ovary abortive, the style-branches sometimes connate; fls white to yellowish or greenish; receptacle flat or merely convex, naked; invol bracts subequal to strongly imbricate, chartaceous or subherbaceous; pappus of numerous capillary bristles, those of the sterile heads fewer and shorter than those of the fertile ones; achenes usually somewhat compressed and ribbed; shrubs or subshrubs with alternate lvs. 400, New World, mainly trop. and warm-temp.