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Green Flat Sedge

Cyperus virens Michx.

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Description

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Herbs, perennial, cespitose; rhizomes 0.5–2 cm, often absent. Culms trigonous, (20–)60–70(–100) cm × 2.4–6.9 mm, scabrid on angles. Leaves 4–12, flat to V-shaped, with readily visible cross ribs especially on abaxial surface, 20–50 cm × 3–14 mm. Inflorescences: heads digitate to hemispheric, 1–3.5 cm diam.; rays 6–12, 1–9(–14) cm; 2d order rays often present, (0.5–)1–3 cm; 3d order rays occasionally present, 5–12 mm; bracts 4–8, horizontal to ascending at 30°, with prominent cross ribs,V-shaped, (1.5–)3–50(–75) cm × 0.5–13 mm; 2d order bracts 3–10 × 1–2 mm. Spikelets 10–40(–50), oblong to linear-lanceoloid, 5–18 × 2–3.2 mm; floral scales 10–40, pale grayish brown, or greenish, proximally greenish or brownish, oblanceolate, 2-keeled, weakly to distinctly 1-ribbed, proximal half 2-ribbed, (1.3–)1.5–2(–2.4) × 0.9–1.4 mm, apex acute (sometimes mucronulate), apically glabrous, occasionally scabridulous. Flowers: stamens 1–2; anthers 0.8–1.4 mm; styles 0.8–1 mm; stigmas 0.6–0.8 mm. Achenes brown, slightly to distinctly stipitate, ellipsoid (2.7–4.1 times as long as wide), (0.9–)1.2–1.5 × 0.3–0.4 mm, apical beak 0.1–0.5 mm, surfaces glabrous.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 23: 143, 153, 154 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Habitat & Distribution

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Fruiting spring–fall. Wet pastures, marshes, roadside ditches; Ala., Fla., Ga., La., Miss., N.C., S.C., Tex.; Mexico; Central America; South America.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 23: 143, 153, 154 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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Distribution ( Spanish; Castilian )

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Chile Central
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Universidad de Santiago de Chile
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Cyperus virens

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Cyperus virens is a species of sedge that is native to southern parts of North America, Central America and South America.[1]

See also

References

  1. ^ "Cyperus virens Michx". Kew Science – Plants of the World Online. Retrieved 28 June 2022.
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Cyperus virens: Brief Summary

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Cyperus virens is a species of sedge that is native to southern parts of North America, Central America and South America.

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Cyperus virens ( Spanish; Castilian )

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Cyperus virens es una especie de planta del género Cyperus.

Descripción

Son plantas perennes, cespitosas, con rizomas cortos y oblicuos, de 2–5 mm de grueso; culmos agudamente triquetros, alcanzando un tamaño de 20–120 cm de alto, los ángulos ásperamente escabrosos. Hojas con láminas en forma de V, 20–80 cm de largo. Brácteas de la inflorescencia 4–11, horizontales a ligeramente ascendentes, hasta 50 cm de largo, rayos 6–12, hasta 14 cm de largo, capítulos digitados, 10–35 mm de ancho; espiguillas 10–40 (50), oblongas a linear-lanceoladas, 5–18 mm de largo y 2–3 mm de ancho, cafés, raquilla persistente; escamas 12–40, ampliamente ovoides, 1.5–2.3 (–3) mm de largo y 1–3 mm de ancho, 2-nervias en la parte media, caducas; estambres 1 o 2, anteras 0.8–1 mm de largo; estigmas 3. Fruto trígono, elipsoide, 1–1.5 mm de largo (con rostro apical 0.1–0.5 mm de largo) y 0.3–0.7 mm de ancho, liso, café.[1]​

Distribución y hábitat

Ocasional, se encuentra en suelos alterados muy húmedos, zona norcentral; a una altitud de 500–1400 m; fl y fr todo el año;[2]​ desde el sur de los Estados Unidos a Argentina.

Taxonomía

Cyperus virens fue descrita por André Michaux y publicado en Flora Boreali-Americana 1: 28. 1803.[1]​

Etimología

Cyperus: nombre genérico que deriva del griego y que significa "junco".

virens: epíteto latino que significa "de color verde".[3]​

Variedades aceptadas
Sinonimia
  • Cyperus acutangulus Boeckeler
  • Cyperus baenitzii Boeckeler
  • Cyperus consanguineus var. minarum (Boeck.) Denton
  • Cyperus formosus Vahl
  • Cyperus glomeratus Walter
  • Cyperus scaberrimus Boeckeler
  • Cyperus surinamensis var. formosus (Vahl) Kük.
  • Cyperus vegetus var. acutangulus (Boeckeler) Kuntze
  • Scirpus reticulatus Lam.[4]​[5]​

Referencias

  1. ↑ a b «Cyperus virens». Tropicos.org. Missouri Botanical Garden. Consultado el 11 de febrero de 2015.
  2. ↑ Moreno 1091, Stevens 5572;
  3. ↑ En Epítetos Botánicos
  4. ↑ Cyperus virens en PlantList
  5. ↑ «Cyperus virens». World Checklist of Selected Plant Families. Consultado el 11 de mayo de 2013.
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Cyperus virens: Brief Summary ( Spanish; Castilian )

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Cyperus virens es una especie de planta del género Cyperus.

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Cyperus virens ( Indonesian )

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Cyperus virens adalah spesies tumbuhan yang tergolong ke dalam famili Cyperaceae. Spesies ini juga merupakan bagian dari ordo Poales. Spesies Cyperus virens sendiri merupakan bagian dari genus Cyperus.[1] Nama ilmiah dari spesies ini pertama kali diterbitkan oleh Michx..

Referensi

  1. ^ "Cyperus". The Plant List. Diakses tanggal 20 Maret 2015.




src= Artikel bertopik tumbuhan ini adalah sebuah rintisan. Anda dapat membantu Wikipedia dengan mengembangkannya.
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Cyperus virens: Brief Summary ( Indonesian )

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Cyperus virens adalah spesies tumbuhan yang tergolong ke dalam famili Cyperaceae. Spesies ini juga merupakan bagian dari ordo Poales. Spesies Cyperus virens sendiri merupakan bagian dari genus Cyperus. Nama ilmiah dari spesies ini pertama kali diterbitkan oleh Michx..

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Cyperus virens ( Vietnamese )

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Cyperus virens là loài thực vật có hoa trong họ Cói. Loài này được Michx. mô tả khoa học đầu tiên năm 1803.[1]

Chú thích

  1. ^ The Plant List (2010). “Cyperus virens”. Truy cập ngày 11 tháng 6 năm 2013.

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Cyperus virens: Brief Summary ( Vietnamese )

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Cyperus virens là loài thực vật có hoa trong họ Cói. Loài này được Michx. mô tả khoa học đầu tiên năm 1803.

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