• 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 - Fls perfect or more often unisexual; plants hermaphrodite, dioecious, or polygamo-dioecious; sep 4–5, green or petaloid, soon deciduous; pet none; filaments elongate, capillary to clavate or much dilated; ovaries several, 1-seeded; style very short; stigma elongate; achenes usually conspicuously veined or ribbed, sometimes stipitate; perennial herbs with ternately decompound lvs and most ample terminal panicles of greenish, yellowish, purplish, or white fls, the color due principally to the stamens; polyploid series based on x=7. 50+, mostly N. Temp.

  • Common Names