|Jepson Flora Project: Jepson Interchange|
|TREATMENT FROM THE JEPSON MANUAL (1993)||
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Jepson Interchange (more information)
©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora.
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 23-branched
Fruit: achene, generally 3-sided
Genera in family: ± 110 genera, 3600 species: worldwide, especially temp
Reference: [Tucker 1987 J Arnold Arbor 68:361445]
Difficult: taxa differ in technical characters of inflorescence and fruit.
Annual or perennial herb, glabrous
Stems generally > 1, erect, 2100 cm, 3-angled or round
Leaves basal; blades 0 or linear
Inflorescence: bracts 19, leaf-like, spreading or erect; rays < 10 cm; spikelets flat to ± cylindric; flower bracts 2-ranked, 1 per flower, 236 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 2:185]
Mature fruit generally needed for identification. C. unioloides R. Br. and C. virens Michx. probably only waifs in CA.
Annual 540 cm
Stem 0.41 mm thick
Inflorescence: bracts 36; rays 05, < 20 mm; spikelets 47 mm, ovate, in ± spheric heads 518 mm wide; flower bract 1.32 mm, ovate-lanceolate, 3-veined, tip outcurved, narrowly acute
Fruit 0.71.1 mm, obovoid-ellipsoid, stalked, smooth, light brown; tip acute, beaked
Ecology: Edges of temporary pools, ponds, streams, ditches
Elevation: 0400 m.
Bioregional distribution: Klamath Ranges, Great Central Valley, Western Transverse Ranges
Distribution outside California: to Washington, north-central&e US
|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).|