Carex sect. Racemosae G. Don in J. C. Loudon (Q508)
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Carex sect. Racemosae is a taxon with the rank section within the genus Carex
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English |
Carex sect. Racemosae G. Don in J. C. Loudon
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Carex sect. Racemosae is a taxon with the rank section within the genus Carex
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Statements
taxon/id/Carex sect. Racemosae G. Don
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Carex sect. Racemosae G. Don
Carex sect. Racemosae
G. Don
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 loosely or densely cespitose, sometimes long rhizomatous or stoloniferous;
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roots brown or black without yellowbrown felty covering.
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Culms purple or red at base.
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Leaves: basal sheaths usually fibrous;
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sheath fronts membranous, mouth entire, proximal leaves, often dotted or tinged red or purple, rarely prominently veined and becoming ladder-fibrillose, glabrous;
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blades V-shaped in cross-section when young, smooth or papillose.
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Inflorescences racemose, with 1–10 spikes;
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proximal bracts threadlike or, rarely, scalelike, sheathless, abaxial surface papillose;
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lateral spikes pistillate, rarely, gynecandrous with few staminate flowers, pedunculate, prophyllate;
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terminal spike gynecandrous with few perigynia, staminate, or pistillate.
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Proximal pistillate scales brown or black, not ciliate, apex obtuse to shortly awned.
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Perigynia erect or ascending, veined or veinless on faces, with 2 distinct marginal veins, sessile, obovoid to suborbicular, rounded or somewhat compressed in cross-section, base cuneate to ± rounded, apex tapering or rounded to beak or rarely beakless, smooth or papillose, glabrous;
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beak entire or shortly bidentate.
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Achenes trigonous, smaller than to almost filling bodies of perigynia;
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black without yellowbrown
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