Jepson Interchange (more information)
Print edition is available from the University of California Press
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This page is based on the 1993 Jepson Manual.
Please see the Jepson eFlora for up-to-date information about California vascular plants. |
| Jepson Flora Project: Jepson Interchange |
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TREATMENT FROM THE JEPSON MANUAL |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
Print edition is available from the University of California Press |
| The second edition of The Jepson Manual (2012) is available from the University of California Press | |
| See also the Jepson eFlora, which parallels the Second Edition |
Annual, perennial herb, in or near water; roots fibrous, from a taproot or not, generally from lower leaf axils as well
Stem generally soft
Leaves simple, opposite, ± 4-ranked; stipules scarious
Inflorescence: flowers axillary or terminal, solitary or clustered
Flowers small, inconspicuous, radial, bisexual; sepals and petals generally free, 3–5, equal in number; ovary spheric, styles 3–5, very short
Fruit: capsule, septicidal, ± spheric, ovoid, or depressed-ovoid, walls thin; chambers 2–5, each several–many-seeded
Seed very small; surface net-like or glossy
Genera in family: 2 genera, 50 species: ± worldwide
Reference: [Tucker 1986 J Arnold Arbor 67:471–483]
Annual, short-lived perennial herb, glabrous
Stem erect underwater, ± prostrate on wet ground, branched or not; base not woody
Leaves opposite, ± 4-ranked; petiole < 1/3 blade, flat, ± blade-like; blades narrowly elliptic to ± round, ± entire, bases wedge-shaped to ± rounded, tips rounded
Inflorescence: flowers 1(2) per node, 0–1 per upper leaf axil
Flower: sepals 3–4, widely elliptic, membranous, very pale green; petals generally as many as and ± = sepals, widely elliptic, membranous, pale greenish white; stamens 3, 6, 8, rarely 1, filaments ± 1/2 X to ± = petals, anthers widely ovoid; styles 3–4
Fruit ± spheric or depressed-ovoid; chambers 3–4, each 3–15- seeded; pedicel generally ± 0
Seeds ± visible through fruit wall, elliptic, straight or curved, brown to yellowish brown; surface net-like
Species in genus: ± 25 species: worldwide
Etymology: (Greek: fir tree, from a Eur sp. that suggests such a plant in miniature)
At least 20X magnification needed for pits on seeds.
| YOU CAN HELP US make sure that our distributional information is correct and current. If you know that a plant occurs in a wild, reproducing state in a Jepson bioregion NOT highlighted on the map, please contact us with that information. Please realize that we cannot incorporate range extensions without access to a voucher specimen, which should (ultimately) be deposited in an herbarium. You can send the pressed, dried collection (with complete locality information indicated) to us (e-mail us for details) or refer us to an accessioned herbarium specimen. Non-occurrence of a plant in an indicated area is difficult to document, but we will especially value your input on those types of possible errors (see automatic conversion of distribution data to maps). |
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