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Coastal Plain Yelloweyed Grass

Xyris ambigua Beyr. ex Kunth

Comments

provided by eFloras
Xyris ambigua is one of the more widespread and weedy of xyrids, frequently invading disturbed moist, sandy areas. It is also one of the most variable in habit and apparently forms intermediates with X. stricta and X. torta.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 22 in eFloras.org, Missouri Botanical Garden. Accessed Nov 12, 2008.
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Flora of North America @ eFloras.org
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Description

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Herbs, perennial, cespitose or solitary, 30--100 cm. Leaves in broad or narrow fans, (5--)10--40(--50) cm; sheath base tan, straw-colored, or pale pink; blade pale or olive green, linear-triangular, (2--)3--7(--10) mm wide, smooth or slightly papillate, margins smooth to minutely scabrous or papillate. Inflorescences: scape sheaths much exceeded by leaves; scapes linear, rarely flexuous, terete or nearly terete, 1--1.5 mm wide, distally usually 2-ribbed, sometimes with additional ribs; spikes ovoid to ellipsoid, lanceoloid, or cylindric, 10--20(--30) mm; fertile bracts 5--8 mm, margins entire, apex rounded. Flowers: lateral sepals included, dark brown, strongly curved, 4--7 mm, keel firm, ciliate, petals unfolding in morning, blade obovate, 10 mm; staminodes bearded. Seeds translucent, ovoid to ellipsoid, 0.5--0.6 mm, finely multiribbed and cross ribbed. 2n = 18.
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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. 22 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
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eFloras

Distribution

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Ala., Ark., Fla., Ga., La., Miss., N.C., S.C., Tenn., Tex., Va.; Mexico; West Indies (Cuba); Mexico; Central America (Belize, Honduras, Nicaragua).
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 22 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

Flowering/Fruiting

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Flowering late spring--fall (all year south).
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 22 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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Habitat

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Acid, sandy, moist pine or oak savanna, pine flatwoods, pond shores, ditches, bogs; 0--300m.
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Missouri Botanical Garden, 4344 Shaw Boulevard, St. Louis, MO, 63110 USA
bibliographic citation
Flora of North America Vol. 22 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
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eFloras

Comprehensive Description

provided by North American Flora
Xyris ambigua Beyr.; Kunth, Enum. PI. 4: 13. 1843
Xyris stricta Chapm. Fl. S. U. S. 500. 1860.
Xyris rhombipetala Wright fSauv. Anal. Acad. Ci. Habana 7: 611. 1871.
Tall, tufted; leaves linear, 15-30 (-40) cm. long, 3-5 (-6) mm. broad, somewhat obtuse at the apex, scabrid or rarely smooth on the margins, elsewhere smooth; sheath occupying about one half the length of the leaf, somewhat dilated and opaque below, pale-rusty at base ; peduncles 50-90 cm. tall, 1.5-2 mm. broad, nearly terete, bicostate above, multistriate or multicostate below, scabrid on the ridges, elsewhere smooth, the peduncular sheath 10-15 (-20) cm long, rusty and shining below; spike many-flowered, ellipsoid or ovoid, 10-20 (-25) mm. long, 5-6 (-7) mm. thick, the outer barren bracts 2-2.5 mm. long, ovate-deltoid, acute or somewhat obtuse, the flowering bracts obovate-elliptic, 7-8.5 mm. long, .5-6 mm. broad, rounded, entire or somewhat lacerate at the apex, straw-colored, tawny, or pale-rusty, somewhat shining, with a deltoid or ovate dorsal area about 2 mm. long; lateral sepals lanceolate, about 6 mm. long and 1.5 mm. broad, acute at the apex; keel broad, especially at the middle, ciliate-scabrid from about the middle to the apex; seeds ellipsoid, 0.4-0.5 mm. long.
Typb locality: Margins of swamps, Georgia.
DISTRIBUTION: North Carolina to Florida and Texas; Cuba (Pinar del RioJ and Isla de Pifios; British Honduras
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bibliographic citation
Albert Charles Smith, Harold Norman Moldenke, Edward Johnston Alexander. 1937. XYRIDALES. North American flora. vol 19(1). New York Botanical Garden, New York, NY
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Xyris ambigua

provided by wikipedia EN

Xyris ambigua, the coastal plain yelloweyed grass,[2] is a North American species of flowering plant in the yellow-eyed-grass family. It is native to southern and eastern Mexico (Tamaulipas, Veracruz, Tabasco, Chiapas, the Yucatán), Central America (Belize, Honduras, Nicaragua), Cuba, and the southeastern and south-central United States (from Texas to Virginia inland to Tennessee and Arkansas).[3][4][5][6]

Xyris ambigua is a perennial herb up to 100 cm (40 inches) tall with grass-like leaves and yellow flowers.[7]

References

  1. ^ The Plant List, Xyris ambigua Beyr. ex Kunth
  2. ^ USDA, NRCS (n.d.). "Xyris ambigua". The PLANTS Database (plants.usda.gov). Greensboro, North Carolina: National Plant Data Team. Retrieved 16 September 2015.
  3. ^ Biota of North America Program 2014 county distribution map
  4. ^ Balick, M. J., M. H. Nee & D.E. Atha. 2000. Checklist of the vascular plants of Belize. Memoirs of The New York Botanical Garden 85: i–ix, 1–246
  5. ^ Kral, R. 2001. Xyridaceae. En: Stevens, W.D., C. Ulloa, A. Pool & O.M. Montiel (eds.). Flora de Nicaragua. Monographs in Systematic Botany from the Missouri Botanical Garden 85(3): 2544–2549
  6. ^ Carnevali, G., J. L. Tapia-Muñoz, R. Duno de Stefano & I. M. Ramírez Morillo. 2010. Flora Ilustrada de la Peninsula Yucatán: Listado Florístico 1–326
  7. ^ Flora of North America, Xyris ambigua Beyrich ex Kunth, 1843.

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Xyris ambigua: Brief Summary

provided by wikipedia EN

Xyris ambigua, the coastal plain yelloweyed grass, is a North American species of flowering plant in the yellow-eyed-grass family. It is native to southern and eastern Mexico (Tamaulipas, Veracruz, Tabasco, Chiapas, the Yucatán), Central America (Belize, Honduras, Nicaragua), Cuba, and the southeastern and south-central United States (from Texas to Virginia inland to Tennessee and Arkansas).

Xyris ambigua is a perennial herb up to 100 cm (40 inches) tall with grass-like leaves and yellow flowers.

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Wikipedia authors and editors
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