• 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 mostly 4-merous; sep 2–4, sometimes very unequal; cor salverform or funnelform, with slender tube and 4 short lobes; ovary bilocular, with a single axile ovule in each locule; fr dry, splitting into 2 nutlets; herbs, ours low and branched, with narrow lvs and small fls sessile in the axils. 50, mainly warm regions.