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
    0–200 m
    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.