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 or perennial herb from rhizomes, submersed or emergent, sometimes dioecious or plants with some unisexual flowers
Stem short, erect, ± scapose
Leaves basal or cauline, alternate, generally narrowly cylindric; sheath open, generally liguled
Inflorescence: spike or raceme (terminal) or flowers solitary in axils; bracts 0
Flower: perianth parts generally 6 in 2 whorls (except 0–1 in Lilaea ), free, greenish; stamens generally 1, 3, or 6, filament short, ± fused to inner perianth parts, anthers elongate, dehiscing outward; pistil 1 (simple) or seemingly so (ovaries 3, 4, or 6, fused to central axis, each with 1 chamber and 1 style), ovule 1 per chamber, style short and plumose or long and thread-like
Fruit: follicle or nutlet
Genera in family: 5 genera, ± 20 species: temp and circumboreal.
Species in genus: 1 sp
Etymology: (A. Raffeneau-Delile, French botanist, 1778–1850)
| Native |
Annual from fibrous roots, aquatic, generally emergent
Stem erect, short, obscure
Leaves basal, tufted, 5–20(45) cm, 1–5 mm wide; sheath 3–10 cm, translucent; blade tip acute to pointed
Inflorescence: bisexual and staminate flowers in erect, generally emergent spike, 6–20 cm; pistillate flowers solitary in submersed axils, enclosed by leaf sheaths
Bisexual flower: perianth part 1, 2–3 mm; stamen 1; ovary 1, chamber 1, ovule 1, style short
Staminate flower: perianth part 1, 2–3 mm; stamen 1
Pistillate flower: perianth 0; ovary 1, chamber 1, ovule 1, style 6–20 cm, thread-like, stigma floating
Fruit: nutlet, 2–10 mm, ribs 25–30; tip beaked
Chromosomes: 2n=12
Ecology: Vernal pools, ditches, streams, ponds, lake margins:
Elevation: < 1700 m.
Bioregional distribution: North Coast, Inner North Coast Ranges, Sierra Nevada, Great Central Valley, Central Western California, South Coast, Peninsular Ranges, Great Basin Floristic Province
Distribution outside California: to w Canada, Montana, Mexico, Chile; naturalized in Australia
Flowering time: Mar–Oct
Sometimes treated in LilaeaceaeHorticultural information: WET, fresh water margins and mud; SUN: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24.
| 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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