Cyperus eragrostis Lamarck in J. Lamarck and J. Poiret (Q3261)

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Cyperus eragrostis is a taxon with the rank species within the subgenus Cyperus subg. Pycnostachys
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English
Cyperus eragrostis Lamarck in J. Lamarck and J. Poiret
Cyperus eragrostis is a taxon with the rank species within the subgenus Cyperus subg. Pycnostachys

    Statements

    taxon/id/Cyperus eragrostis Lamarck
    0 references
    Cyperus eragrostis Lamarck
    Cyperus eragrostis
    Lamarck
    FNA Editorial Committee. 2002. Flora of North America north of Mexico. Volume 23: Cyperaceae. Oxford University Press, New York.
    accepted
    souchet vigoureux (French)
    souchet robuste (French)
    tall flatsedge (English)
    tall cyperus (English)
    South America
    naturalized
    Europe
    damp grasslands
    roadsides ditches
    Herbs, perennial, cespitose, rhizomatous.
    Culms trigonous to terete, (25–) 40–60 (–90) cm, glabrous.
    Leaves flat or V-shaped, (10–) 25–50 cm × 5–8 (–12) mm.
    Inflorescences: heads globose, (10–) 20–40 mm diam.;
    rays (0–) 3–10, 2.5–5 (–12) cm;
    2d order rays usually absent (when present, 0.5–1.5 cm);
    bracts 4–8, horizontal to ascending at 15–30°, flat (or V-shaped), 3–30 (–50) cm × 1.5–8 (–12) mm.
    Spikelets (20–) 30–50 (–70), oblong, compressed, 5–20 × 2.2–3 mm;
    floral scales (12–) 20–30 (–50), off-white to golden brown, basally 2-keeled, laterally ribless, ovate-deltate, 2–2.3 × 1–1.4 mm (declined 30–40º from rachilla).
    Flowers: stamen 1;
    anthers 1–1.2 mm;
    styles 1–1.2 mm;
    Achenes black or dark-brown, stipitate, broadly ellipsoid, 1.2–1.4 × 0.5–0.6 mm, stipe to 0.1 mm, apex apiculate, beak 0.2–0.3 mm, surfaces puncticulate.