Jepson Flora Project: Jepson Interchange    

 
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Jepson Interchange (more information)
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  • Up-to-date information about California vascular plants is available from the Jepson eFlora.

CYPERACEAE

SEDGE FAMILY

Raymond Cranfill, except as specified

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.

ELEOCHARIS

SPIKERUSH

Annual or perennial herb
Stem generally round, ridged and grooved, generally solid
Leaves basal, 1(–4); base sheathing; blade generally 0
Inflorescence: spikelet solitary, terminal, erect; spikelet bract 0; flower bracts generally spiraled
Flowers bisexual; perianth bristles 0–6, persistent, barbs generally recurved; stamens (1–)3; style 2–3-branched, base bulb-like, persistent
Fruit 2–3-sided or round; top tubercled
Species in genus: ± 250 species: worldwide
Etymology: (Greek: marsh grace)
St shape best seen in fresh material (or just below spikelet); drying exaggerates ridges and grooves.

Native

E. parishii Britton

Perennial 1–3 dm, not glaucous; rhizome long, reddish
Leaf purplish brown, becoming straw-colored above; tip truncate, 1-toothed
Inflorescence: spikelet 10–15 mm, much wider than stem, ± linear-lanceolate, generally 10–many-flowered, tip acute to acuminate; flower bract ± dark brown, tip short, translucent
Flower: style 3-branched
Fruit: perianth bristles 6–7, unequal, = or > fruit; body ± 1 mm, obovate, appearing 2-sided, yellowish to light brown, shiny; tubercle short, conic, base barely narrowed
Chromosomes: n=5
Ecology: Moist, often sandy openings
Elevation: generally < 2000 m.
Bioregional distribution: California (except Modoc Plateau)
Distribution outside California: to Oregon, Nevada, New Mexico, n Mexico
Flowering time: May–Sep
Synonyms: E. montevidensis vars. disciformis (Parish) V.E. Grant and p. (Britton) V.E. Grant
Horticultural information: TRY; GRCVR; also STBL.

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