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Strawcolored Flatsedge

Cyperus strigosus L.

Brief Summary

    Cyperus strigosus: Brief Summary
    provided by wikipedia

    Cyperus strigosus is a species of sedge known by the common names false nutsedge and straw-colored flatsedge. It is native to the United States, Cuba, and Canada, where it grows in wet areas in many habitat types, including disturbed and cultivated areas such as roadsides and crop fields. It is common and sometimes weedy. It is a perennial sedge growing up to 70 centimeters tall. The inflorescence is a cluster of many linear-shaped spikelets up to 3 centimeters long each. A few long, leaflike bracts grow at the base of the spike.

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    6110337dc0ad518ec838d46371608c21

Comprehensive Description

Distribution

    Distribution
    provided by eFloras
    Man., Ont., Que., Sask.; Ala., Ariz., Ark., Calif., Colo., Conn., Del., D.C., Fla., Ga., Idaho, Ill., Ind., Iowa, Kans., Ky., La., Maine, Md., Mass., Mich., Minn., Miss., Mo., Nebr., Nev., N.H., N.J., N.Mex., N.Y., N.C., Ohio, Okla., Oreg., Pa., R.I., S.C., S.Dak., Tenn., Tex., Utah, Vt., Va., Wash., W.Va., Wis.
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    Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
    bibliographic citation
    Flora of North America Vol. 23: 146, 148, 182, 183, 184, 185 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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    Flora of North America @ eFloras.org
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    Flora of North America Editorial Committee
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    ID
    114259_distribution

Morphology

    Comments
    provided by eFloras
    Cyperus strigosus is usually among the more common Cyperus species throughout its range. Small individuals flowering the first year may be difficult to distinguish from C. polystachyos, C. odoratus, C. erythrorhizos, and C. esculentus, which may be sympatric. Cyperus strigosus has trigonous achenes and three stigmas, unlike C. polystachyos; C. strigosus has flattened spikelets, unlike the subcylindric ones of C. odoratus; C. strigosus has floral scales usually 3 mm or more, unlike the smaller (1.2–1.5 mm) ones of C. erythrorhizos; C. strigosus has deciduous floral scales and a cormlike stem base with stolons, unlike C. esculentus.

    Cyperus strigosus appears to be closely related to the neotropical C. camphoratus Liebmann; both species have deciduous floral scales and deciduous spikelets (G. C. Tucker 1994). Plants segregated as C. stenolepis cannot be distinguished consistently from C. strigosus on any single charcter, rather they appear to be merely large individuals of C. strigosus with long floral scales and frequently septate inflorescence bracts (M. L. Horvat 1941).

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    Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
    bibliographic citation
    Flora of North America Vol. 23: 146, 148, 182, 183, 184, 185 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
    source
    Flora of North America @ eFloras.org
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    Flora of North America Editorial Committee
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    eFloras.org
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    eFloras
    ID
    114258
    Description
    provided by eFloras
    Herbs, perennial (often flowering first year), rhizomatous. Culms basally swollen and cormlike, trigonous, (1–)20–40(–90) cm × 1–6 mm, glabrous or few prickles subapically. Leaves flat, (10–)20–40 cm × 1–4(–8) mm, margins and midribs glabrous or scabridulous. Inflorescences: spikes 1–4, loosely ovoid to oblong-cylindric; (6–)10–28(–50) × 10–40 mm; rays sometimes absent, usually (1–)3–6(–8), 0.5–7(–25) cm; if absent, inflorescence a congested head; 2d order rays sometimes present, 1–4(–9) cm; rachis 8–18(–25) mm; bracts (3–)5–7(–10), ascending at 30–45°, cross ribs sometimes conspicuous, (1–)10–30(–45) cm × (1–)2–4(–12) mm; rachilla ± deciduous, wings 0.4–0.5 mm wide. Spikelets (5–)12–50, linear-lanceoloid, compressed, 5–30 × 0.6–0.9 mm; floral scales ± deciduous, 3–11, appressed, medially green, laterally stramineous to pale brown, 3–4-ribbed laterally, (1–)3-ribbed medially, oblong-obovate, 3.2–4.5(–6) × 1–1.8 mm, apex ± acute, overlapping lower 1/4–1/2 of next scale. Flowers: anthers 0.3–0.5 mm; styles 1–2 mm; stigmas 3–4 mm. Achenes purplish brown, ± stipitate, narrowly oblong, (1.5–)1.8–2.4 × 0.5–0.6 mm, apex apiculate, acute, surfaces puncticulate.
    license
    cc-by-nc-sa-3.0
    copyright
    Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
    bibliographic citation
    Flora of North America Vol. 23: 146, 148, 182, 183, 184, 185 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
    source
    Flora of North America @ eFloras.org
    editor
    Flora of North America Editorial Committee
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    eFloras.org
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    eFloras
    ID
    114257

Diagnostic Description

    Synonym
    provided by eFloras
    Cyperus hansenii Britton; C. stenolepis Torrey; C. strigosus var. hansenii (Britton) Kükenthal; C. strigosus var. stenolepis (Torrey) Kükenthal; Mariscus stenolepis (Torrey) C. B. Clarke; M. strigosus (Linnaeus) C. B. Clarke
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    cc-by-nc-sa-3.0
    copyright
    Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
    bibliographic citation
    Flora of North America Vol. 23: 146, 148, 182, 183, 184, 185 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
    source
    Flora of North America @ eFloras.org
    editor
    Flora of North America Editorial Committee
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    eFloras.org
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    eFloras
    ID
    114256

Habitat

    Habitat
    provided by eFloras
    Pond shores, ditches, damp, disturbed soils, sometimes weeds of gardens or croplands; 0–1500m.
    license
    cc-by-nc-sa-3.0
    copyright
    Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
    bibliographic citation
    Flora of North America Vol. 23: 146, 148, 182, 183, 184, 185 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
    source
    Flora of North America @ eFloras.org
    editor
    Flora of North America Editorial Committee
    project
    eFloras.org
    original
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    eFloras
    ID
    114259

Cyclicity

    Flowering/Fruiting
    provided by eFloras
    Fruiting summer.
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    cc-by-nc-sa-3.0
    copyright
    Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
    bibliographic citation
    Flora of North America Vol. 23: 146, 148, 182, 183, 184, 185 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
    source
    Flora of North America @ eFloras.org
    editor
    Flora of North America Editorial Committee
    project
    eFloras.org
    original
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    partner site
    eFloras
    ID
    114259_cyclicity