Carex sect. Rhynchocystis Dumortier (Q599)

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

    Statements

    taxon/id/Carex sect. Rhynchocystis Dumortier
    0 references
    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
    Carex sect. Rhynchocystis
    Plants densely cespitose, in large clumps, short-rhizomatous.
    Culms reddish purple at base, 90–180 cm.
    Leaves: basal sheaths sometimes fibrous;
    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.
    Inflorescences racemose, with 5–8 spikes;
    proximal bracts leaflike, long-sheathing, sheath 4+ mm, longer than diameter of stem;
    lateral spikes pistillate, with at least 100 perigynia in each, (30–) 60+ mm or some spikes androgynous, pendent, pedunculate, prophyllate;
    terminal spikes usually staminate.
    Proximal pistillate scales with apex acute to acuminate or short-awned.
    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;
    beak 0.5 mm or less, erose-ciliate, bidentate, teeth less than 0.1 mm.
    Achenes trigonous, smaller than bodies of perigynia;