• 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 - Thallus flat or slightly convex on both sides, usually somewhat asymmetrical, marked with 3–15 obscure to evident nerves diverging from a nodal point near the base; roots 2–12+, descending from the nodal point, each with a single vascular strand; reproductive pouches 2, lateral, opposite the nodal point; infl (seldom produced) in one of the lateral pouches, with 2 staminate fls and one pistillate, collectively subtended by a tiny spathe; anther bilocular; ovules 1–4. 4, cosmop.

  • Common Names