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.
Annual or perennial herb, glabrous
Stems generally > 1, erect, 2–100 cm, 3-angled or round
Leaves basal; blades 0 or linear
Inflorescence: bracts 1–9, leaf-like, spreading or erect; rays < 10 cm; spikelets flat to ± cylindric; flower bracts 2-ranked, 1 per flower, 2–36 per spikelet
Flower bisexual; perianth 0; stigmas generally 3
Fruit (ob)ovoid, generally 3-angled, brown, generally not beaked
Etymology: (Greek: name for 1 sp.)
Reference: [Tucker 1983 Syst Bot Monogr 2:1–85]
Mature fruit generally needed for identification. C. unioloides R. Br. and C. virens Michx. probably only waifs in CA.
| Native |
Annual 1–10(20) cm
Inflorescence: bracts 1–4, 1–15 cm; rays 0–6, 4–40 mm; spikelets 1–30, 2–20 mm, widely lanceolate to oblong, flat, greenish, yellowish, or reddish brown, in open, ovoid spikes 5–15 mm wide; flower bracts 2–8 per spikelet, 1.2–2 mm, oblong-lanceolate, 5–11-veined, bristle-like tip 0.5–1.3 mm
Flower: stamen 1
Fruit 0.7–1.1 mm, ± obovoid, light brown to black
Ecology: Moist, sunny, disturbed places, especially pond margins, riverbanks
Elevation: 0–1500 m.
Bioregional distribution: California
Distribution outside California: temperate and tropical ± worldwide
Flowering time: Jun–Nov
Synonyms: C. aristatus Rottb
| 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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