Eleocharis subg. Scirpidium (Nees) Kukkonen (Q3328)

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Eleocharis subg. Scirpidium is a taxon with the rank subgenus within the genus Eleocharis
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English
Eleocharis subg. Scirpidium (Nees) Kukkonen
Eleocharis subg. Scirpidium is a taxon with the rank subgenus within the genus Eleocharis

    Statements

    taxon/id/Eleocharis subg. Scirpidium (Nees) Kukkonen
    0 references
    Eleocharis subg. Scirpidium (Nees) Kukkonen
    Eleocharis subg. Scirpidium
    (Nees) Kukkonen
    FNA Editorial Committee. 2002. Flora of North America north of Mexico. Volume 23: Cyperaceae. Oxford University Press, New York.
    accepted
    Eleocharis subg. Scirpidium
    North America to South America
    West Indies
    Eurasia
    Hawaii
    Australia (probably )
    Plants annual or perennial, very rarely with spikelets proliferating, culms never rooting at tips (spikelets very rarely proliferating in Eleocharis reverchonii).
    Rhizomes present or absent, creeping.
    Tubers and bulbs (resting buds) absent, or resting buds sometimes present in E. acicularis.
    Culms 1–40 cm × 0.2–1.2 mm, spongy, transverse septa incomplete.
    Spikelets ovoid to subcylindric, terete, much wider than their culms, 2–9 mm;
    rachilla with proximal internodes as long and as thick as internodes in middle of spikelet;
    proximal scale subtending a flower;
    floral scales ca. 4–30 per spikelet, spiraled, 1–3.5 mm, with 1 vein or fewer than 10 widely spaced longitudinal veins, membranous.
    Achenes trigonous to nearly terete, 0.5–1.1 mm, with 9–13 longitudinal rows of fine horizontal ridges (trabeculae) between much more prominent longitudinal ridges and achene angles.
    Tubercles distinct from achene in color, texture and form, not dorsoventrally greatly compressed.