Carex laxiculmis Schweinitz (Q108)

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Carex laxiculmis is a taxon with the rank species within the section Carex sect. Careyanae
Language Label Description Also known as
English
Carex laxiculmis Schweinitz
Carex laxiculmis is a taxon with the rank species within the section Carex sect. Careyanae

    Statements

    taxon/id/Carex laxiculmis Schweinitz
    0 references
    Carex laxiculmis Schweinitz
    Carex laxiculmis
    Schweinitz
    FNA Editorial Committee. 2002. Flora of North America north of Mexico. Volume 23: Cyperaceae. Oxford University Press, New York.
    accepted
    spreading sedge (English)
    weak-stemmed wood sedge (English)
    carex à tiges faibles (French)
    Plants densely cespitose.
    Culms erect, ascending, or spreading, 9–48 cm × 0.6–1 mm.
    Leaves: basal sheaths white or very light-brown;
    nonbasal sheaths 7–32 mm, sheath blades 0.9–11.9 cm × 1–7 mm;
    leaf-blades erect, ascending, or spreading, green or glaucous, 8–36 cm × 3–12 mm;
    blades of vegetative shoots 0–3.5 times wider than bract blades.
    Inflorescences: spikes (3–) 4 (–5) per culm, scattered;
    peduncles of pistillate spikes exserted 0–9 cm;
    of staminate spikes exserted 0–9.5 cm;
    bracts 2–11.8 cm × 1.3–4.8 mm.
    Pistillate spikes: the proximal basal, scattered, drooping.
    Staminate spike 1, linear, 8–22 × 1.2–3 mm.
    Pistillate scales keeled, 2.5–3.2 × 1–1.5 mm, midribs green, margins hyaline or, occasionally, reddish-brown outward, apex cuspidate to acute, awn to 1 mm, proximal scale of lateral spike sterile or subtending a staminate flower.
    Staminate scales obovate, 3.5–4.5 × 1–1.2 mm, midribs green, margins hyaline or reddish-brown outward, apex acute.
    Anthers 2–3 mm.
    Perigynia 4–9 per spike, finely veined, elliptic-ovoid, 2.5–4 × 1.5–2 mm;
    beak slightly bent, tapering.
    Achenes obvoid to broadly ovoid, 2.2–3.2 × 1.2–1.8 mm, slightly concave at maturity, tightly fitting in perigynia.