Carex sect. Acrocystis Dumortier (Q54)

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Carex sect. Acrocystis is a taxon with the rank section within the genus Carex
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English
Carex sect. Acrocystis Dumortier
Carex sect. Acrocystis is a taxon with the rank section within the genus Carex

    Statements

    taxon/id/Carex sect. Acrocystis Dumortier
    0 references
    Carex sect. Acrocystis Dumortier
    Carex sect. Acrocystis
    Dumortier
    FNA Editorial Committee. 2002. Flora of North America north of Mexico. Volume 23: Cyperaceae. Oxford University Press, New York.
    accepted
    Carex sect. Acrocystis
    Circumtemperate and circumboreal
    Plants loosely or densely cespitose, very short to long rhizomatous, stoloniferous.
    Culms red or brown at base, shorter than leaves.
    Leaves: basal sheaths fibrous;
    blades V-shaped in cross-section when young, adaxial surface without 2 marginal veins more prominent than midvein, blade 2+ cm, longer than its sheath, 2–4.5 mm wide, glabrous.
    Inflorescences racemose, with 2–6 spikes;
    proximal nonbasal bracts filiform or scalelike, sheathless, abaxial surface smooth;
    lateral spikes pistillate or, rarely, gynecandrous or staminate, sometimes some basal, pedunculate, prophyllate;
    terminal spike staminate.
    Proximal pistillate scales white-hyaline or redbrown, 1–3-veined, apex obtuse to acuminate or cuspidate, rarely awned.
    Perigynia ascending, veined or veinless except for 2 strong marginal veins, stipitate, elliptic or ovate to orbiculate, round or rounded-trigonous in cross-section, less than 10 mm, base tapering or rounded, often spongy, apex usually abruptly beaked, pubescent, rarely glabrous;
    beak straight or bent, 0.5–2.3 mm, bidentate, teeth 0.2–0.5 mm.
    Stigmas (2–) 3.
    Achenes trigonous, rarely biconvex, almost as large as bodies of perigynia;