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Rooted Spike Rush

Eleocharis exigua (Kunth) Roem. & Schult.

Comprehensive Description

provided by North American Flora
Eleocharis radicans (Poir.) Kunth, Enum. PI
2 : 142. 1837.
Scirpus radicans Poir. in Lam. Encyc. 6: 751. 1804. (Puerto Rico.)
Eleogiton radicans A. Dietr. Sp. PI. 2 : 97. 1833.
Eleocharis costulata Kunth, Enum. PI. 2: 142. 1837. (Chile.)
Chaetocyperus costnlatus Nees, Nova Acta Acad. Leop. -Carol. 19 (Suppl. 1) : 96. 1843.
Eleocharis acicularis var. Lindheimeri Clarke; Britton, Jour. N. Y. Micr. Soc. 5: 105. 1889, as
syn. (Texas.) Eleocharis acicularis var. radicans Britton, Jour. N. Y. Micr. Soc. 5: 105. 1889. Eleocharis Lindheimeri Svenson, Rhodora 31 : 199. 1929.
Culms matted, 3-8 cm. high, light green, soft and spongy, striate; rootstocks slender
and extensively creeping, white or light brown; roots fibrous, white; sheaths membranous,
closely investing the culm, fugacious; spikelets ovate, acute, 3-4 mm. long, 6-12-flowered;
scales ovate-lanceolate, the lower blunt, green, striate, the upper often strongly keeled at the
tip ; style trifid ; stamens 3 ; anthers 0.3-0.4 mm. long ; achenes narrowly obovate, yellowish,
about 0.7 mm. long (excluding the narrow, conic beak), with elevated longitudinal ridges
and about 30-40 close trabeculae in each longitudinal series ; bristles usually 4, very slender,
white, retrorsely toothed, exceeding the achene or sometimes lacking.
Type locality : "Porto Rico, dans les terrains marecageux, par M. Ledru."
Distribution: Virginia (Fernald), Michigan, Texas, Oklahoma, and California; northern
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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 radicans

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Eleocharis radicans is a species of spikesedge known by the common name rooted spikerush. This aquatic or semi-aquatic plant is native to the Americas as far north as Virginia and northern California. It grows in wet places such as streams, lakes, bogs, and moist meadows, where it roots on soaked ground or floats in the water. This is a rhizomatous, mat-forming perennial with thread-thin, spongy stems. It may have several thin leaves. The stems are topped with papery spikelets about half a centimeter long at maximum size and containing 4 to 12 flowers, each covered with a light-colored bract. The fruit is a minute white or yellow achene less than a millimeter long.

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Eleocharis radicans: Brief Summary

provided by wikipedia EN

Eleocharis radicans is a species of spikesedge known by the common name rooted spikerush. This aquatic or semi-aquatic plant is native to the Americas as far north as Virginia and northern California. It grows in wet places such as streams, lakes, bogs, and moist meadows, where it roots on soaked ground or floats in the water. This is a rhizomatous, mat-forming perennial with thread-thin, spongy stems. It may have several thin leaves. The stems are topped with papery spikelets about half a centimeter long at maximum size and containing 4 to 12 flowers, each covered with a light-colored bract. The fruit is a minute white or yellow achene less than a millimeter long.

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