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 from corms, stolons, rhizomes, or tubers, aquatic (± emergent or on mud), generally bisexual; roots fibrous
Stem: caudex short
Leaves: basal, simple, palmately veined, sometimes floating; submersed blades generally linear to ovate; emergent blades linear to sagittate
Inflorescence generally scapose, umbel- to panicle-like; flowers whorled, in interrupted clusters
Flowers bisexual or unisexual, radial; sepals 3, generally green, generally persistent; petals 3, generally > sepals, white or pink; stamens 6–many; pistils 6–many, generally simple
Fruit: achene, generally compressed, beaked
Genera in family: ± 12 genera, 75–100 species: especially n hemisphere
Reference: [Rogers 1983 J Arnold Arbor 64: 383–420]
Annual or short-lived perennial herb; roots not partitioned
Leaf: petiole angled; blade linear to cordate
Inflorescence: peduncle generally smooth; flowers > 3 per node
Flower bisexual; receptacle convex; sepals generally 2–6 mm, dark green; petals generally entire, white; stamens 9–many; pistils many, free, in spheric cluster
Fruit: cluster bur-like; body ± compressed, generally ribbed, tapered to beak
Species in genus: ± 50 species: Am, especially tropics
Etymology: (Greek: spiny, leathery container, from fruit)
Reference: [Haynes & Holm-Nielsen 1986 Brittonia 38:325–332]
| Native |
Generally annual in CA
Leaves 8–30 cm; blade with transparent lines, coarsely veined; submerged blades linear, wavy; floating and emergent blades 6–14 cm, 3–15 cm wide, elliptic to cordate
Inflorescence generally > leaves; peduncle angled; pedicels < 20 mm, generally ascending
Flower: petals 6–9 mm; stamens ± 12
Fruit: body 1.5–3 mm, ribs generally 5; beak < 2 mm
Chromosomes: 2n=22
Ecology: Ponds, ditches
Elevation: < 300 m.
Bioregional distribution: Inner North Coast Ranges, Great Central Valley, Central Western California, Southwestern California
Distribution outside California: to se US, S.America
Synonyms: var. lanceolatus (Engelm.) FassettHorticultural information: TRY.
| 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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