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Key to families | Table of families and genera
Indexes to all 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 |
Perennial, 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.
1 genus, 6 species: ± worldwide. [Les 1997 FNANM 3:81–84] —Scientific Editor: Thomas J. Rosatti.
Previous taxon: Anemopsis californica
Next taxon: Ceratophyllum
Citation for the whole project: Jepson Flora Project (eds.) [year] Jepson eFlora, http://ucjeps.berkeley.edu/IJM.html [accessed on month, day, year]
Citation for an individual treatment: [Author of taxon treatment] [year]. [Taxon name] in Jepson Flora Project (eds.) Jepson eFlora, [URL for treatment]. Accessed on [month, day, year].
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