| TREATMENT FROM THE JEPSON MANUAL (1993) |
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Jepson Interchange (more information) |
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©Copyright 1993 by the Regents of the University of California
For up-to-date information about California vascular plants, visit the Jepson eFlora. |
AND IS MAINTAINED FOR ARCHIVAL PURPOSES ONLY |
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, cespitose
Stem round, slender, solid, ridged and grooved
Leaves several, basal; bases sheathing, margins wide, scarious; blades 0 to linear, flat, folded, or upcurled
Inflorescence: spikelets in terminal, panicle-like clusters; flower bracts spiraled, deciduous
Flowers bisexual; perianth bristles 0; stamens generally 3; style 2–3-branched, generally fringed below branches, widest at base, deciduous
Fruit 2–3-sided or round, surface cells ± square or horizontally elongate
Species in genus: ± 200 species: worldwide
Etymology: (Latin: fringed style)
Reference: [Kral 1971 Sida 4:57–227]
| Native |
Annual < 1 dm
Stem > leaf, round
Leaves spiraled; blade ± thread-like, upcurled
Inflorescence: spikelets in tight clusters, subsessile, elongate, tips acute; flower bracts glabrous, fruiting bracts lanceolate, straw-colored to pale green, midrib dark green, exserted, tip acute
Flower: style 2-branched
Fruit ± 0.6 mm, obovoid to round, pale brown
Chromosomes: 2n=20
Ecology: Wet soil, often mud flats, silty levees
Elevation: < 500 m.
Bioregional distribution: San Joaquin Valley, e Sonoran Desert
Distribution outside California: to se US, C.America
Flowering time: Jul–Nov
Perhaps alien.