Cyperus schweinitzii Torrey (Q3249)

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Cyperus schweinitzii is a taxon with the rank species within the subgenus Cyperus subg. Juncellus
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Cyperus schweinitzii Torrey
Cyperus schweinitzii is a taxon with the rank species within the subgenus Cyperus subg. Juncellus

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    taxon/id/Cyperus schweinitzii Torrey
    0 references
    Cyperus schweinitzii Torrey
    Cyperus schweinitzii
    FNA Editorial Committee. 2002. Flora of North America north of Mexico. Volume 23: Cyperaceae. Oxford University Press, New York.
    accepted
    souchet de Schweinitz (French)
    Schweinitz's flatsedge (English)
    Schweinitz's cyperus (English)
    Schweinitz's umbrella sedge (English)
    sand flatsedge (English)
    sand nutsedge (English)
    sand umbrella sedge (English)
    Schweinitz’s flatsedge (English)
    1 reference
    Packer, J.G. & A.J. Gould. 2017.Vascular Plants of Alberta. Part 1: Ferns, Fern Allies, Gymnospermes, and Monocots. University of Calgary Press, Calgary.
    1 reference
    Harms, V.L. 2006. Annotated catalogue of Saskatchewan vascular plants. http://www.biodiversity.sk.ca/Docs/AnnotatedCatalogueSKVascPlants2006.pdf
    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/
    1 reference
    Tardif, B., B. Tremblay, G. Jolicoeur & J. Labrecque. 2016. Les plantes vasculaires en situation précaire au Québec. CDPNQ, Gouv. Québec, MDDELCC, Direction de l'expertise en biodiversité, Québec, 420 p. http://www.cdpnq.gouv.qc.ca/pdf/plantesVasculairesWeb.pdf
    Mexico (Coahuila)
    riverbanks
    sand bars
    lakeshores
    sand dunes
    sandy openings
    0–1000 m
    Herbs, perennial, rhizomatous.
    Culms trigonous, (10–) 20–50 cm × (0.6–) 1–2 mm, glabrous or more often scabridulous, either in distal 1/2 or over entire length;
    basal sheaths, 1–3, light-brown, 1–4 cm, papery.
    Leaves flat to V-shaped, (2–) 20–35 cm × 2–6 mm, margins and keel minutely scabridulous;
    proximal leaves bladeless.
    Inflorescences: spikes ± umbellate to slenderly (infrequently broadly) ovoid, 10–25 × 7–16 mm;
    rays 3–5, 1.5–8 (–15) cm;
    bracts 3–7, erect (or declined at most 25–30° from vertical), (2.5–) 8–20 (–25) cm × (0.5–) 1.5–6 mm;
    Spikelets (1–) 5–10 (–20), oblong to linearoblong, quadrangular, 7–10 (–18) × (2.8–) 3.2–4 (–4.5) mm;
    floral scales deciduous, (1–) 5–10 (–14), spreading, laterally stramineous or dull whitish, sometimes also red-spotted, medially green, laterally 2–3-ribbed, medially 3-ribbed, broadly ovate to oblongovate, (2.3–) 2.8–3.2 × (2–) 2.4–3.2 mm, apex broadly rounded, often clear-erose, cusp 0.1–0.4 mm in proximal scales, 0.3–1 mm in distal scales.
    Flowers: anthers 0.8–1.4 mm;
    styles 0.1–0.3 mm;
    stigmas 1.5–3 mm.
    Achenes light to dark-brown or nearly black, broadly ellipsoid, infrequently obovoid, 2–2.4 × 0.9–1.4 mm, base cuneate to ± stipelike, apex obtuse to broadly rounded, surfaces papillose.