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Oval Spike Rush

Eleocharis ovata (Roth) Roem. & Schult.

Comments

provided by eFloras
Although Eleocharis ovata has often been confused with E. obtusa, B. M. H. Larson and P. M. Catling (1996) showed that these species may be distinguished by non-overlapping widths of the tubercles, at least in Canada. The records of E. ovata in New Brunswick, Newfoundland, Nova Scotia, and Prince Edward Island are based on B. M. H. Larson and P. M. Catling (1996) and the records in Illinois, Indiana, Missouri, Montana, New Jersey, Oregon, and Washington are based on D. M. Hines (1975). Eleocharis ovata probably also occurs in Manitoba and Saskatchewan.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 23: 64, 97, 101, 103, 104, 105 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Description

provided by eFloras
Culms 2–35 cm × 0.3–1 mm. Leaves: apex of distal leaf sheath obtuse to acute, tooth to 0.2 mm. Spikelets ovoid, 2–8 × 2–4 mm, apex acute (to blunt); floral scales 25–100+, ca. 10 per mm of rachilla, orange-brown, rarely stramineous, ovate, 1.5–2 × 1 mm, midribs often keeled in distal part of spikelet, apex rounded to subacute. Flowers: perianth bristles present, rarely absent, (5–)6–7, brown, fairly slender, exceeding tubercle; stamens 2(–3); anthers brown, 0.3 mm; styles 2-fid or some 3-fid. Achenes 0.75–1 × 0.6–0.85 mm. Tubercles deltoid, 0.3–0.5 × 0.3–0.5 mm, 3/5 of to as high as wide, 1/3–2/3 as high and 1/2–3/4 as wide as achene. 2n = 10.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 23: 64, 97, 101, 103, 104, 105 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
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Flora of North America Editorial Committee
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eFloras.org
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Habitat & Distribution

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Fruiting summer–fall. Fresh, often drying shores, lake and stream beds, bogs, tidal estuaries, disturbed places; 10–700 m (East), 1500–2000 m (Arizona); Alta., B.C., N.B., Nfld. and Labr., N.S., Ont., P.E.I., Que.; Ariz., Conn., Ill., Ind., Iowa, Ky., Maine, Mass., Mich., Minn., Mo., N.H., N.J., N.Y., Ohio, Okla., Oreg., Pa., Vt., Va., Wash., W.Va., Wis.; Eurasia.
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 23: 64, 97, 101, 103, 104, 105 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Flora of North America Editorial Committee
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eFloras.org
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Synonym

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Scirpus ovatus Roth, Tent. Fl. Germ. 2: 562. 1793; Eleocharis obtusa (Willdenow) Schultes var. ovata (Roth) Drepalik & Mohlenbrock; E. ovata var. heuseri Uetrichtz
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cc-by-nc-sa-3.0
copyright
Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 23: 64, 97, 101, 103, 104, 105 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
source
Flora of North America @ eFloras.org
editor
Flora of North America Editorial Committee
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eFloras.org
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Comprehensive Description

provided by North American Flora
Eleocharis ovata (Roth) R. & S. Syst. Veg. 2: 152. 1817.*
Trichophyllum ovatuni Farwell, Rep. Mich. Acad. 21 : 358. 1920. Eleocharis annua House, Bull. N. Y. State Mus. 243-244: 58. 1923.
In habit similar to E. obtusa, but usually less coarse; culms 0.3-5 dm. long; spikelet globose-ovoid to ovoid-cylindric, obtuse or acute, many-flowered, 2-8 mm. long ; scales oblong to narrowly ovate, obtuse, purplish-brown, with pale midrib and base and a white, scarious margin ; style bifid or trifid ; achene obovoid or inverted-pyriform, light brown, shining, 1 mm. long excluding the deltoid-conic style-base, which is half as broad as the summit of the achene ; bristles light brown, 6 or 7, exceeding the achene or frequently lacking.
Type locality : Europe.
Distribution : Scattered, chiefly northward on lake margins : Newfoundland and Quebec, south to Maine and Vermont ; Michigan, Wisconsin, Minnesota, Washington, Oregon ; Eurasia.
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bibliographic citation
Henry Knut Svenson. 1957. (POALES); (CYPERACEAE); SCIRPEAE (CONTINUATIO). North American flora. vol 18(9). New York Botanical Garden, New York, NY
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Eleocharis ovata

provided by wikipedia EN

Eleocharis ovata, the ovate spikerush, is a species of annual grass in the family Cyperaceae (sedges). They have a self-supporting growth form and have simple, broad leaves and green flowers. Individuals can grow to 1.5 feet.[1][2]

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Definition of Free Cultural Works logo notext.svg This article incorporates text from a free content work. Licensed under CC0 (license statement/permission). Text taken from Eleocharis ovata​, . Encyclopedia of Life.

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Eleocharis ovata: Brief Summary

provided by wikipedia EN

Eleocharis ovata, the ovate spikerush, is a species of annual grass in the family Cyperaceae (sedges). They have a self-supporting growth form and have simple, broad leaves and green flowers. Individuals can grow to 1.5 feet.

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