Difference between revisions of "Carex sect. Rhynchocystis Dumortier (Q599)"
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Latest revision as of 12:40, 24 June 2022
Carex sect. Rhynchocystis is a taxon with the rank section within the genus Carex
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Carex sect. Rhynchocystis Dumortier
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Carex sect. Rhynchocystis is a taxon with the rank section within the genus Carex
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Statements
taxon/id/Carex sect. Rhynchocystis Dumortier
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Carex sect. Rhynchocystis Dumortier
Carex sect. Rhynchocystis
Dumortier
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 densely cespitose, in large clumps, short-rhizomatous.
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Culms reddish purple at base, 90–180 cm.
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Leaves: basal sheaths sometimes fibrous;
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blades flat to M-shaped in cross-section when young, adaxial side with 2 lateral-veins more prominent than midvein, widest leaves not more than 10 mm wide, glabrous.
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Inflorescences racemose, with 5–8 spikes;
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proximal bracts leaflike, long-sheathing, sheath 4+ mm, longer than diameter of stem;
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lateral spikes pistillate, with at least 100 perigynia in each, (30–) 60+ mm or some spikes androgynous, pendent, pedunculate, prophyllate;
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terminal spikes usually staminate.
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Proximal pistillate scales with apex acute to acuminate or short-awned.
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Perigynia ascending, weakly veined on faces, with 2, strong, marginal veins, sessile, elliptic or ovate, obtusely and asymmetrically trigonous in cross-section, base tapering, apex abruptly beaked, glabrous;
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beak 0.5 mm or less, erose-ciliate, bidentate, teeth less than 0.1 mm.
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Achenes trigonous, smaller than bodies of perigynia;
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trigonous
obtusely; asymmetrically
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