Description
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Herbs, perennial, to 100 cm; rhizomes absent; stolons present; corms present. Leaves emersed; petiole 5-ridged, ascending to erect, 24.5--60 cm; blade sagittate, 11.5--26.5 ´ 0.8--15 cm, basal lobes longer than remainder of blade. Inflorescences racemes, rarely panicles, of 5--17 whorls, emersed, 20--37 ´ 5--27 cm; peduncles 25--96 cm; bracts connate more than or equal to ¼ total length, lanceolate, 6.5--15 mm, delicate, not papillose; fruiting pedicels spreading, cylindric, 1.5--4.4 cm. Flowers to 3 cm diam.; sepals recurved to spreading, not enclosing flower; filaments cylindric, shorter than anthers, glabrous; pistillate flowers pedicellate, without ring of sterile stamens. Fruiting heads 0.9--1.5 cm diam; achenes oblanceoloid, abaxially keeled, 1.2--2.5 ´ 0.8--1.6 mm, beaked; faces tuberculate, wings absent, glands 0--1; beak lateral, erect, 0.1--0.6 mm.
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Distribution
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Ariz., Calif., Kans., Nebr., Okla., Tex.; Mexico; Central America (Nicaragua).
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Flowering/Fruiting
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Flowering summer--fall.
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Habitat
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Wet ditches, ephermeral pools, and margins of streams and lakes; 0--300m.
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Synonym
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Sagittaria greggii J. G. Smith
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Comprehensive Description
provided by North American Flora
Sagittaria longiloba Engelm. Bot. Mex. Bound
Surv. 212. 1858.
Sagittaria sagittifolia mexicana Mart. & Gal. Bull. Acad. Roy. Belg. 9 2 : 379. 1842. Not S. mexicana Steud. 1841.
Plants mostly emersed, 3-15 dm. tall; leaf-blades 9-23 cm. long, the terminal lobe linear to lanceolate, the basal lobes linear or linear-lanceolate, twice or thrice as long as the terminal one, long-acuminate ; scapes simple or rarely branched ; whorls of the inflorescence 4—8 or more, remote, the one to three lower ones with pistillate flowers ; pedicels slender, 15-35 mm. long, spreading; bracts lanceolate, 6-8 mm. long, acuminate; sepals oblong, oval or obovate, becoming 6-7 mm. long; corolla 1.5-2.5 cm. broad; filaments not dilated, glabrous ; anthers oblong, shorter than the filaments ; fruit-heads 10-15 mm. in diameter ; achenes cuneate, 1 mm. long, the margins somewhat undulate, the beak very short, lateral.
Type locality : San Elceario.
Distribution : Nebraska and Colorado to Texas and Mexico.
- bibliographic citation
- Percy Wilson, Per Axel Rydberg, Norman Taylor, Nathaniel Lord Britton, John Kunkel Small, George Valentine Nash. 1909. PANDANALES-POALES; TYPHACEAE, SPARGANACEAE, ELODEACEAE, HYDROCHARITACEAE, ZANNICHELLIACEAE, ZOSTERACEAE, CYMODOCEACEAE, NAIADACEAE, LILAEACEAE, SCHEUCHZERIACEAE, ALISMACEAE, BUTOMACEAE, POACEAE (pars). North American flora. vol 17(1). New York Botanical Garden, New York, NY
Comprehensive Description
provided by North American Flora
Sagittaria greggii J. G. Smith, Rep. Mo. Bot. Gard. 6 : 43. 1894
Plants partially emersed, 9-15 dm. tall ; leaf -blades hastate, 20-40 cm. long, the terminal lobe ovate to lanceolate, acute or slightly acuminate, the basal lobes lanceolate or linear-lanceolate, acuminate, about as long as the terminal one or longer ; scapes 5-angled near the base, branched ; whorls of the inflorescence several or many ; bracts lanceolate or linear-lanceolate, acuminate, 15-30 mm. long ; pedicels of the lower whorls 15-30 mm. long, mostly ascending; sepals oval to obovate, becoming 6-8 mm. long; corolla mostly 1-2 cm. broad, or more; filaments not dilated, glabrous; anthers about as long as the filaments or shorter ; fruit-heads 8-15 mm. in diameter ; achenes obovate to orbicular-obovate, 2-3 mm. long, thick-margined, the beak minute.
Type locality : Mexico. Distribution : California and Mexico.
- bibliographic citation
- Percy Wilson, Per Axel Rydberg, Norman Taylor, Nathaniel Lord Britton, John Kunkel Small, George Valentine Nash. 1909. PANDANALES-POALES; TYPHACEAE, SPARGANACEAE, ELODEACEAE, HYDROCHARITACEAE, ZANNICHELLIACEAE, ZOSTERACEAE, CYMODOCEACEAE, NAIADACEAE, LILAEACEAE, SCHEUCHZERIACEAE, ALISMACEAE, BUTOMACEAE, POACEAE (pars). North American flora. vol 17(1). New York Botanical Garden, New York, NY
Sagittaria longiloba
provided by wikipedia EN
Sagittaria longiloba is a species of flowering plant in the water plantain family known by the common name longbarb arrowhead[2] and Gregg arrowhead. It is native to the south-central and southwestern United States (Texas, New Mexico, Oklahoma, Kansas, Nebraska, Arizona and California) plus Mexico, Venezuela and Nicaragua. It is also reportedly naturalized in the western Himalayas of India and Bhutan.[3] It grows in slow-moving, stagnant, and ephemeral water bodies such as ponds and small streams, and sometimes disturbed and cultivated habitat such as rice fields and irrigation ditches.[4]
Sagittaria longiloba is a perennial aquatic plant growing from a spherical tuber. The leaves are sagittate, or shaped like arrowheads with two longer, narrower, pointed lobes opposite the shorter tip. The leaf blades are borne on very long petioles. The plant is monoecious, with individuals bearing both male and female flowers. The inflorescence which rises above the surface of the water is a raceme made up of several whorls of flowers, the lowest node bearing female flowers and upper nodes bearing male flowers. The flower is up to 3 centimeters wide with three white petals. The male flowers have rings of stamens at the centers. Female flowers each have a spherical cluster of pistils which develops into a head of tiny fruits.[4][5][6][7]
References
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Sagittaria longiloba: Brief Summary
provided by wikipedia EN
Sagittaria longiloba is a species of flowering plant in the water plantain family known by the common name longbarb arrowhead and Gregg arrowhead. It is native to the south-central and southwestern United States (Texas, New Mexico, Oklahoma, Kansas, Nebraska, Arizona and California) plus Mexico, Venezuela and Nicaragua. It is also reportedly naturalized in the western Himalayas of India and Bhutan. It grows in slow-moving, stagnant, and ephemeral water bodies such as ponds and small streams, and sometimes disturbed and cultivated habitat such as rice fields and irrigation ditches.
Sagittaria longiloba is a perennial aquatic plant growing from a spherical tuber. The leaves are sagittate, or shaped like arrowheads with two longer, narrower, pointed lobes opposite the shorter tip. The leaf blades are borne on very long petioles. The plant is monoecious, with individuals bearing both male and female flowers. The inflorescence which rises above the surface of the water is a raceme made up of several whorls of flowers, the lowest node bearing female flowers and upper nodes bearing male flowers. The flower is up to 3 centimeters wide with three white petals. The male flowers have rings of stamens at the centers. Female flowers each have a spherical cluster of pistils which develops into a head of tiny fruits.
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