Ceratophyllum echinatum A.Gray
  • Manual
  • Hornwort, cornifle échinée

Notes: More details could be found in The Plant List v.1.1. Originally in The Plant List v.1.0

General Description

Stems to 1 m; apical leaf whorls not densely crowded. Leaves dark green or olive-green, fine-textured. Leaf blade simple or forked into 2-10 ultimate segments (forking of largest leaves 3d or 4th order), proximal segments often conspicuously inflated, mature leaf whorls 25-55 mm diam., marginal denticles weak and inconspicuous, weakly exserted, not raised on broad base of green tissue; 1st leaves of plumule forked. Achene dark green or brown, body (excluding spines) 4.5-6 × 2.5-4.5 × 1.5-3 mm, basal spines 2 (rarely absent), straight or curved, 1-5 mm, marginal spines 2-13, 0.5-6.5 mm, terminal spine straight, 1.5-7.5 mm, margins winged. 2 n = 24.

  • Provided by: [B].Flora of North America @ efloras.org
    • Source: [
    • 2
    • ]. 

    "Much like no. 1 [Ceratophyllum demersum L.]; lvs more flaccid, the larger ones mostly 3(4) times forked, the ultimate segments commonly narrower, entire or with a few small, very slender teeth; achenes with several unequal marginal spines as well as 2 basal ones, conspicuously tuberculate on the surface; all plumular lvs forked. Quiet water; N.S. and N.B. to B.C., s. to Fla. and trop. Amer.; less often collected than no. 1."

  • Provided by: [C].New York Botanical Garden
    • Source: [
    • 3
    • ]. 

    Local Names

    Hornwort, cornifle échinée


     Information From

    World Flora Online Data. 2017.
    • A CC0 1.0 Universal (CC0 1.0).
    Flora of North America @ efloras.org
    'Flora of North America @ eFloras (2008). Published on the Internet http://www.efloras.org/flora_page.aspx?flora_id=1 [accessed August 2016]' Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
    • B Flora of North America Association
    New York Botanical Garden
    Descriptions of plants should be attributed to the full citation for each individual article, chapter or book that is the source for each record, which should include the authors of original publication.
    • C Content licensed under Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License