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.
Carex sect. Laxiflorae is a taxon with the rank section within the genus Carex

    Statements

    taxon/id/Carex sect. Laxiflorae (Kunth) Mackenzie
    0 references
    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
    Carex sect. Laxiflorae
    North America
    Central America
    Plants usually densely cespitose, short to long rhizomatous.
    Culms solitary or not, brown or purple at base.
    Leaves: basal sheaths not fibrous;
    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.
    Inflorescences racemose, with 3–6 spikes;
    proximal nonbasal bracts leaflike, long-sheathing, more than 4 mm, longer than diameter of stem;
    lateral spikes pistillate, rarely basal, pedunculate, prophyllate;
    terminal spike staminate.
    Proximal pistillate scales with apex obtuse, acute, or awned.
    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;
    beak 0.1–1.8 mm, usually more than 5 mm, orifice entire.
    Achenes trigonous;