• 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 sessile or subsessile in the axils of bracts, aggregated into spikes or heads; sep 4, the 2 next the bract often slightly different from the 2 next the axis (sometimes ± connate); cor long-persistent, its tube investing the summit of the fr; capsule circumscissile at or below the middle; ours annual or perennial herbs, most spp. acaulescent. 200+, cosmop.

  • Common Names