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, often rhizomed, often of wet open places, generally monoecious; roots fibrous, hairy
Stem generally 3-sided
Leaves often 3-ranked; sheath generally closed; ligule generally 0; blade (0) various, parallel-veined
Inflorescence: spikelets variously clustered; flowers generally sessile in axil of flower bract
Flower small, generally wind-pollinated; perianth 0 or bristle-like; stamens generally 3, anthers attached at base, 4-chambered; ovary superior, 1-chambered, 1-ovuled, style 2–3-branched
Fruit: achene, generally 3-sided
Genera in family: ± 110 genera, 3600 species: worldwide, especially temp
Reference: [Tucker 1987 J Arnold Arbor 68:361–445]
Difficult: taxa differ in technical characters of inflorescence and fruit.
Perennial
Stem rounded or 3-sided, leafy, solid
Leaves sheathing
Inflorescence generally subtended by 1+ awn-like bracts; spikelets 1–many in generally terminal clusters; flower bracts spiraled, lower generally sterile, upper generally staminate, others bisexual
Flower: perianth bristles 5–many, persistent; stamens 3; style 2-branched, base much expanded, persistent as tubercle on fruit
Fruit 2-sided
Species in genus: ± 200 species: worldwide, especially tropical
Etymology: (Greek: beaked seed)
Reference: [Gale 1944 Rhodora 46:89–134;159–197;207–249;255–278]
| Native |
Inflorescence: flower bracts tawny to whitish
Flower: perianth bristles 5–6, < 1/2 fruit, barbs ascending
Fruit 1.2–1.6 mm, body ovoid to ± spheric, dark, strongly ridged; tubercle not chalky- white
Ecology: Marshes, seeps
Elevation: < 500 m.
Bioregional distribution: s Outer North Coast Ranges (Pitkin Marsh, Sonoma Co.)
Distribution outside California: also e N.America
Remarkably separated from e North America range.
See the CNPS Inventory for information about endangerment and rarity.| 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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