Eleocharis subg. Scirpidium (Nees) Kukkonen (Q3328)
Eleocharis subg. Scirpidium is a taxon with the rank subgenus within the genus Eleocharis
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Eleocharis subg. Scirpidium (Nees) Kukkonen
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Eleocharis subg. Scirpidium is a taxon with the rank subgenus within the genus Eleocharis
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Statements
taxon/id/Eleocharis subg. Scirpidium (Nees) Kukkonen
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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
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Plants annual or perennial, very rarely with spikelets proliferating, culms never rooting at tips (spikelets very rarely proliferating in Eleocharis reverchonii).
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Rhizomes present or absent, creeping.
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Tubers and bulbs (resting buds) absent, or resting buds sometimes present in E. acicularis.
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Culms 1–40 cm × 0.2–1.2 mm, spongy, transverse septa incomplete.
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Spikelets ovoid to subcylindric, terete, much wider than their culms, 2–9 mm;
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rachilla with proximal internodes as long and as thick as internodes in middle of spikelet;
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proximal scale subtending a flower;
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floral scales ca. 4–30 per spikelet, spiraled, 1–3.5 mm, with 1 vein or fewer than 10 widely spaced longitudinal veins, membranous.
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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.
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Tubercles distinct from achene in color, texture and form, not dorsoventrally greatly compressed.
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compressed
not dorsoventrally greatly
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