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Eleocharis montana image of habit, Raghu Maramraj

Eleocharis montana image of habit, Raghu Maramraj

Mounted specimen of Eleocharis montana , Raghu Maramraj

Elocharis montana image of leaf sheath, Raghu Maramraj

Elocharis montana image of stem longitudinal section with septa, Raghu Maramraj

Elocharis montana image of spikelet, Raghu Maramraj

Elocharis montana image of stem cross section showing septum, Raghu Maramraj

 

Elocharis montana image of stem cross section showing septum, Raghu Maramraj

 

Elocharis montana image of basal spikelet scales, Raghu Maramraj

Elocharis montana image of spikelet scales, Raghu Maramraj

Elocharis montana image of anther with measurement, Raghu Maramraj

Elocharis montana image of anther with measurement, Raghu Maramraj

Elocharis montana image of style, Raghu Maramraj

Elocharis montana image of spikelet showing achenes and dehiscent floral scales, Raghu Maramraj

Elocharis montana image of achene with measurement, Raghu Maramraj

Elocharis montana image of achene with measurement, Raghu Maramraj

Ecology

Fresh temporary or artificial ponds, ditches, burned savannas, swamp margins

 

 

Family

CYPERACEAE L. (sedge family)

Flowering period

Mostly April through November.

Flowers

Perianth bristles 6–8, pale brown, medium stout, from less than 1/2 achene length to sometimes slightly extending beyond tubercle base, retrorsely spinulose; stamens 1; anthers dark yellow to brown, 0.6–1 mm; styles 2-fid (+3-fid).

 

 

Fruit

Achenes falling with scales, dark green or medium brown, obovoid to obpyriform, biconvex or sometimes compressed trigonous in same spikelet, lateral angles prominent, abaxial angle not prominent, 0.8–1.1 × 0.7–0.8 mm; neck short or absent, finely cancellate, sometimes finely rugulose, with 15 horizontal ridges in vertical series; tubercles brown, pyramidal, 0.2-0.35 x 0.2-0.4 mm. 

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Habit and Stem

Plants perennial, densely tufted or mat-forming; rhizomes mostly hidden by long culms and roots, 3 mm thick, hard, cortex persistent, scales persistent, membranous, slightly fibrous.

 

Culms terete, 10–70 cm × 0.5–2 mm, soft to firm, internally hollow with complete transverse septa 2–5 mm apart.

Habit and stem features

Plants perennial, densely tufted or mat-forming; rhizomes mostly hidden by long culms and roots, 3 mm thick, hard, cortex persistent, scales persistent, membranous, slightly fibrous.

 

Culms terete, 10–70 cm × 0.5–2 mm, soft to firm, internally hollow with complete transverse septa 2–5 mm apart.

Leaves

Distal leaf sheaths persistent, not splitting, proximally dark red, distally green or brown, slightly callose, papery, apex obtuse, tooth present, 0.3–1 mm.

References

Correll, D. S. and M. C. Johnston. 1970. Manual of the Vascular Plants ofTexas. Texas Research Foundation, Renner, Texas.

International Plant Names Index (2004). Published on the internet http://www.ipni.org [accessed 1 March 2004]*.

Kartesz, J.T. 1994. A Synonymized Checklist of the Vascular Flora of the United States, Canada, and Greenland, Second edition, Volume I-checklist.

Smith, S. G., J. J. Bruhl, M. S. González-Elizondo, & F. J. Menapace.  2002. Eleocharis in Cyperaceae. Vol. 23.  Flora of North America Editorial Committee, eds. 1993+. Flora of North America North of Mexico. 7+ vols. New York and Oxford.

Thomas, R. D. and C. M. Allen. 1993. Atlas of the Vascular Flora of Louisiana. vol. I: Ferns & Fern Allies, Conifers, & Monocots. Louisiana Department of Wildlife and Fisheries & the Nature Conservancy, Louisiana Field Office.

USDA, NRCS. 2004. The PLANTS Database, Version 3.5 (http://plants.usda.gov). National Plant Data Center, Baton Rouge, LA 70874-4490 USA

Species name

Eleocharis montana (Kunth) Roemer & Schultes in J. J. Romer et al.,  Systema vegetabilium 2: 153. 1817.

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Synonyms

Eleocharis montana var. nodulosa (Roth) Svens

Eleocharis nodulosa (Roth) J.A. Schultes