Hydrocharis morsus-ranae L.

  • 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

    Hydrocharis morsus-ranae L.

  • Description

    Species Description - Much like Limnobium spongia in aspect, but the lvs more consistently cordate-orbicular, less obviously spongy beneath, and with more broadly arching (even initially descending) lateral veins; dioecious; stolons with seasonally dimorphic terminal buds; pet ca 1 cm, 2–3 times as long as the sep, white with a yellow basal spot; outer (antesepalous) stamens basally connate with those of the third cycle; anthers ca 1 mm long and wide; styles 6, ca 4 mm overall; 2n=28. Slow-moving water, ditches, and pools; native of Europe, intr. and spreading, from Que. to s. Ont. and n. N.Y. along the St. Lawrence and Ottawa rivers and along lakes Erie and Ontario.

  • Common Names

    European frog's-bit