Cyperus flavescens Linnaeus (Q3266)

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Cyperus flavescens is a taxon with the rank species within the subgenus Cyperus subg. Pycreus
Language Label Description Also known as
English
Cyperus flavescens Linnaeus
Cyperus flavescens is a taxon with the rank species within the subgenus Cyperus subg. Pycreus

    Statements

    taxon/id/Cyperus flavescens Linnaeus
    0 references
    Cyperus flavescens Linnaeus
    Cyperus flavescens
    Linnaeus
    FNA Editorial Committee. 2002. Flora of North America north of Mexico. Volume 23: Cyperaceae. Oxford University Press, New York.
    accepted
    souchet jaunâtre (French)
    annual yellow flatsedge (English)
    yellow flatsedge (English)
    pale flatsedge (English)
    yellowish umbrella sedge (English)
    yellow cyperus (English)
    1 reference
    Newmaster, S.G. & S. Ragupathy. 2005. Flora Ontario - Integrated Botanical Information System (FOIBIS), Phase I. University of Guelph, Canada. http://www.uoguelph.ca/foibis http://www.uoguelph.ca/foibis/
    West Indies
    South America
    Eurasia
    Africa
    Herbs, annual, cespitose.
    Culms trigonous, (2–) 4–30 cm × 0.4–2 mm, glabrous.
    Leaves 1–5, (blades often absent, base of culm with 1 reddish sheath bearing minute blade tooth 1–2 mm), (3–) 10–18 cm × (0.5–) 1.5–2 (–2.6) mm.
    Inflorescences: spikes 1–3, ovoid or ± digitate, 10–30 × 8–26 mm;
    rays 1–4 (–6), 0.5–3 (–9) cm;
    bracts 2–3, approximately horizontal, 1–12 cm × 0.5–2.5 mm.
    Spikelets 1–6, compressed, oblong-lanceoloid, 5–15 × (2–) 2.3–2.8 mm;
    floral scales (4–) 8–24, closely imbricate, laterally yellow to yellowish-brown, margins light-brown to clear, medially green, laterally ribless, medially 2–3-ribbed, 2-keeled basally, ovate, (1.5–) 1.8–2.2 × 1.8 mm, apex obtuse.
    Flowers: stamens 3;
    anthers 0.4 mm, connectives not prolonged;
    styles 0.5–1 mm;
    stigmas 0.5–0.8 mm.
    Achenes jet black to reddish-brown, slightly stipitate, obovoid, 1–1.2 × 0.8 mm, apex apiculate, surface with network of rectangular longitudinally elongate cells and transverse undulations.