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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 |
Annual, short-lived perennial herb, in or near water; roots fibrous, from taproot or not, generally from lower leaf axils also.
Stem: generally soft.
Leaf: simple, opposite, ± 4-ranked; stipules scarious.
Inflorescence: flowers in upper axils, 1 or few in clusters.
Flower: small, inconspicuous, radial, bisexual; sepals, petals 2–5, equal in number, generally free; ovary spheric, styles 3–5, short.
Fruit: capsule, septicidal, ± spheric, ovoid, or depressed-ovoid, walls thin; chambers 2–5, each several to many-seeded.
Seed: small; surface net-like or glossy.
2 genera, 50 species: ± worldwide. [Yang & Tucker 2007 Fl China 13:55–56] —Scientific Editor: Thomas J. Rosatti.
Unabridged references: [Tucker 1986 J Arnold Arbor 67:471–483]
Key to Elatinaceae
Key to Elatine
Stem: Erect underwater, ± prostrate on wet ground, branched or not; base not woody.
Leaf: petiole < 1/3 blade, flat, ± blade-like; blades narrow- elliptic to ± round, ± entire, bases wedge-shaped to ± round, tips round.
Inflorescence: flowers 1(2) per node.
Flower: sepals, petals wide- elliptic, membranous; sepals pale green; petals pale green-white; stamens (1) 3, 6, 8, filaments 1/2 × to ± equal petals, anthers wide- ovoid; styles 3–4.
Fruit: ± spheric or depressed-ovoid; chambers 3–4, each 3–15-seeded; pedicel generally ± 0.
Seed: ± visible through fruit wall, elliptic, straight or curved, brown to yellow-brown; surface net-like due to ridges between ± linear rows of pits.
± 25 species: worldwide. (Greek: fir tree, from a Eur sp. that suggests such a plant in miniature) At least 20× magnification needed for pits on seeds.
Stem: decumbent, 2–5 cm.
Leaf: obovate to wide-oblong- elliptic; petiole ± 1/4 blade.
Inflorescence: flowers 1 per node.
Flower: sepals 2, ± equal; petals 3, ovate; stamens (1) 6 (if 3, opposite petals).
Fruit: chambers 3.
Seed: wide- elliptic, curved 15–30°; pits 12–16 per row, wider than long.
Pond edges; 1000–1500 m. North Coast Ranges, Sierra Nevada.
Previous taxon: Elatine chilensis
Next taxon: Elatine rubella
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].
Copyright © 2012 Regents of the University of California
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Chart based on elevation range in Manual and elevations and coordinates of CCH records.
Data provided by the participants of the Consortium of California Herbaria.
Note: About half of the CCH records include both elevation and coordinates.
| Data provided by the participants of the Consortium of California Herbaria.
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