Carex sect. Laxiflorae (Kunth) Mackenzie in N. L. Britton et al. (Q271)
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Carex sect. Laxiflorae is a taxon with the rank section within the genus Carex
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English |
Carex sect. Laxiflorae (Kunth) Mackenzie in N. L. Britton et al.
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Carex sect. Laxiflorae is a taxon with the rank section within the genus Carex
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Statements
taxon/id/Carex sect. Laxiflorae (Kunth) Mackenzie
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Carex sect. Laxiflorae (Kunth) Mackenzie
Carex sect. Laxiflorae
(Kunth) Mackenzie
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 usually densely cespitose, short to long rhizomatous.
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Culms solitary or not, brown or purple at base.
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Leaves: basal sheaths not fibrous;
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blades usually M-shaped in cross-section when young, adaxial side of blades with 2 lateral-veins more prominent than midvein, widest leaf-blades 5+ mm, glabrous.
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Inflorescences racemose, with 3–6 spikes;
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proximal nonbasal bracts leaflike, long-sheathing, more than 4 mm, longer than diameter of stem;
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lateral spikes pistillate, rarely basal, pedunculate, prophyllate;
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terminal spike staminate.
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Proximal pistillate scales with apex obtuse, acute, or awned.
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Perigynia ascending, yellowbrown, to dark-brown when mature, not black-mottled, distinctly 8-veined or more, stipitate, obovate to narrowly obovate, trigonous to rounded-trigonous in cross-section, base tapering, apex tapering to rounded, abruptly or gradually beak, smooth, glabrous;
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beak 0.1–1.8 mm, usually more than 5 mm, orifice entire.
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Achenes trigonous;
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obovate
narrowly obovate trigonous
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obovate
narrowly obovate trigonous
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