Carex sect. Hymenochlaenae (Drejer) L. H. Bailey in J. M. Coulter (Q229)

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Carex sect. Hymenochlaenae is a taxon with the rank section within the genus Carex
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Carex sect. Hymenochlaenae (Drejer) L. H. Bailey in J. M. Coulter
Carex sect. Hymenochlaenae is a taxon with the rank section within the genus Carex

    Statements

    taxon/id/Carex sect. Hymenochlaenae (Drejer) L.H. Bailey
    0 references
    Carex sect. Hymenochlaenae (Drejer) L.H. Bailey
    Carex sect. Hymenochlaenae
    (Drejer) L.H. Bailey
    FNA Editorial Committee. 2002. Flora of North America north of Mexico. Volume 23: Cyperaceae. Oxford University Press, New York.
    accepted
    Carex sect. Hymenochlaenae
    North America
    Mexico
    Central America
    Europe
    Africa
    Plants densely cespitose or forming loose colonies, short-rhizomatous;
    shoots both vegetative and flowering.
    Culms usually maroon, or less often brown, tan, or pale green at base.
    Leaves: basal sheaths usually bladeless, sometimes fibrous;
    blades M-shaped in cross-section when young, adaxial side with 2 lateral-veins more prominent than midvein;
    widest leaves not more than 13 mm, glabrous or pubescent, not septate-nodulose.
    Inflorescences racemose, with 3–7 (–16 in C. obispoensis) spikes;
    proximal nonbasal bracts leaflike, except in C. castanea, sheaths usually longer than 5 mm, except in C. castanea, C. misera, and C. sprengelii;
    lateral spikes erect or nodding, pistillate, with no more than 50 perigynia, the distal ones androgynous, rarely the proximal 1 gynecandrous, pedunculate, peduncle 1+ cm, prophyllate;
    terminal spike erect, staminate, gynecandrous, or rarely androgynous.
    Proximal pistillate scales green with broad hyaline margins, hyaline portions white or, more often, suffused with maroon or chestnut-brown, apex obtuse to acuminate or awned, awn not more than 3 mm, glabrous, margins sometimes ciliate.
    Perigynia erect or ascending, veined or veinless on faces, with 2 strong marginal veins, sometimes stipitate, narrowly lanceovoid to fusiform to oblong-ovoid, trigonous or rounded-trigonous, 2–10 mm, more than 3 times as long as wide, base tapering or rounded, apex tapering or abruptly contracted to beak or beakless, glabrous or pubescent;
    beak 0.5–3 mm, ca. 1/2 length of body, orifice entire to bidentate, teeth to 1 mm.
    Achenes trigonous, smaller than to almost as large as bodies of perigynia;
    x = 16–30.