Jepson eFlora: Taxon page
Vascular Plants of California
Key to families | Table of families and genera
Previous taxon Index to accepted names and synonyms:
| A | B | C | D | E | F | G | H | I | J | K | L | M |
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
Next taxon


Higher Taxonomy
Family: CeratophyllaceaeView Description 

Habit: Perennial herb, submersed aquatic; overwintering on bottom as detached, dense shoot tips (winter buds); roots 0; monoecious; water-pollinated. Stem: flexible with water currents, internodes clustered near tip. Leaf: whorled, generally compound, forked; segments linear, toothed; stipules 0; petiole 1--2 mm, translucent. Inflorescence: reduced axillary cymes generally near shoot tips, +- sessile, 1--several per node, generally staminate below, pistillate above, or sometimes mixed at a node; flowers 1--3 per cyme but appearing to be 1 subtended by calyx-like whorl of 8--15 bracts, bracts linear, leaf-like, fused at base, toothed at tip, persistent in fruit. Flower: unisexual; perianth 0; staminate round-topped, stamens 3--50, spirally arranged, anthers +- sessile, exserted from bracts, pollen shed underwater; pistillate of 1 simple, ovoid pistil, ovary superior, chamber 1; placenta pendulous; style elongate, spine-like, with decurrent groove; stigma pocket-like, at style base; ovule 1. Fruit: achene, tubercled or not, spines 0 or elongate, basal, facial, marginal or stylar; lateral margin winged or not.
Genera In Family: 1 genus, 6 species: +- worldwide.
eFlora Treatment Author: Donald H. Les
Scientific Editor: Thomas J. Rosatti.

Etymology: (Greek: horn leaf, for antler-like appearance) Note: Ceratophyllum grown as ornamental or for oxygen generation in aquaria, garden ponds. Leaves, fruit eaten by migrating waterfowl. Vigorous growth (even of native species) can result in weedy infestations.
Jepson eFlora Author: Donald H. Les
Index of California Plant Names (ICPN; linked via the Jepson Online Interchange)

Previous taxon: Ceratophyllaceae
Next taxon: Ceratophyllum demersum

Name Search

Please use this Google Form for Contact/Feedback

Citation for this treatment: Donald H. Les 2012, Ceratophyllum, in Jepson Flora Project (eds.) Jepson eFlora,, accessed on May 28, 2024.

Citation for the whole project: Jepson Flora Project (eds.) 2024, Jepson eFlora,, accessed on May 28, 2024.