Comments
provided by eFloras
Personal observation of Heteranthera limosa suggests that it is best adapted for growth in water less than 5 cm deep and is a poor competitor with the closely related H. rotundifolia in deeper waters.
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Description
provided by eFloras
Plants annual. Vegetative stems submersed with elongate inter-nodes only on plants in over 5 cm of water, or emersed and short. Flowering stems 2–24 cm, distal internode 1–11 cm. Sessile leaves forming basal rosette, blade linear to oblanceolate, thin or sometimes thickened, 3.1–6 cm × 3–5 mm. Petiolate leaves emersed; stipule 1–6 cm; petiole 2–13 cm; blade oblong to ovate, 1–5 cm × 4–33 mm, length equaling or greater than width; base truncate to cuneate, apex acute. Inflorescences 1-flowered; spathes 0.9–4.5 cm, glabrous. Flowers opening within 1 hour after dawn, wilting by midday; perianth blue or white, salverform, tube 15–44 mm, limbs essentially actinomorphic, lobes equal, narrowly elliptic, 5.2–26.3 mm, distal lobes yellow toward base; stamens unequal, lateral stamens 2.3–7.8 mm, central stamen 3.3–7.2 mm; filaments linear, glandular-pubescent; style glabrous. Seeds 9–14-winged, 0.5–0.8 × 0.2–0.6 mm. 2n = 14.
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Distribution
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Ariz., Ark., Calif., Colo., Fla., Ill., Iowa, Kans., Ky., La., Miss., Mo., Nebr., N.Mex., Okla., S.Dak., Tenn., Tex.; Mexico; West Indies; Central America; South America (Argentina, Bolivia, Brazil, Colombia, Ecuador, Paraguay, Venezuela).
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Flowering/Fruiting
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Flowering May--Nov.
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Habitat
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Shallow water or emersed at pond edges and in roadside ditches; 0--2000m.
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Synonym
provided by eFloras
Pontederia limosa Swartz, Prodr., 57. 1788; Leptanthus ovalis Michaux
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Comprehensive Description
provided by North American Flora
Heteranthera limosa (Sw.) Wilid. Ges. Nat. Freunde Berlin Xeue Schr. 3: 439. 1801.
Pontederia limosa Sw. Prodr. 57. 1788.
l.epianthus oralis Michx. Fl. Bor. Am. 1: 25. 1803.
Heteranthera alismoides Link, Jahrb. Gewachsk. I 3 : 73. 1820.
Lunania unifiora Raf. Med. Fl. 2: 106. 1830.
Triexastema unifiora Raf. Fl. Tell. 4: 121. 1838.
Schollera limosa Kuntze, Rev. Gen. 719. 1891.
Phrynium limosum Kuntze, Rev. Gen. 3 3 : 318. 1898.
Plants rooting in mud, sometimes with a creeping stem; leaves erect, the petioles up to 20 cm. long, the blades lanceolate to nearly orbicular, 1-5 cm. long, rounded at the apex, short cuneate, truncate, rounded or shallowly cordate at the base, the stipules up to 5 cm long, rounded or emarginate at the apex, and usually minutely caudate; lower spathe-bract like the leaves, the upper ones oblong, 1.5-4 cm. long, tapering to a markedly caudate apex, erect or slightly curved above; inflorescence 1-flowered; perianth 2-6 cm. long, the tube 1-4 cm. long whitish, the lobes violet-blue with a white triangle at the base, or all white, linear-lanceolate, nearly alike; filaments glabrous; an-hers hnear-lanc olate, nearly alii e, the thecae somewhat spreading at the base; style glabrous; stigma three-parted, each branch with a tuft of hairs at the apex; capsule oblong or narrowly ellipsoid, 1-2.5 cm. long; seeds 0.6-0.8 mm. long, 0.3-0.4 mm. wide, columnar, 10-12-ridged, gray-brown, the seed-coat coarsely striate horizontally.
Type locality: Jamaica.
Distribution: Virginia to South Dakota. Colorado. Texas, and New Mexico, Mexico, Central America, and the West Indies; also in South America.
- 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
Heteranthera limosa
provided by wikipedia EN
Heteranthera limosa is an annual flowering plant in the water hyacinth family known by the common names ducksalad and blue mudplantain. It grows in shallow water or on mud. It is considered a threatened species in parts of the central United States, and an invasive species weed in California, where it is a nuisance in rice paddies. It is also occasional in Florida waterways.
Description
Heteranthera limosa is a polymorphic annual growing 2 to 6 inches tall. It looks different depending on the type of habitat it is growing in; plants in water look different than those growing on muddy ground. It is easily confused with other closely related species, so reliable identification is based on flowering plants.[2] It has thick, spade-shaped green leaves with parallel veins. When plants are grown in water the leaves may be above or below the water surface, with submerged leaves linear in shape.[3] The branching stems are creeping and maybe as long as 15 inches, rooting at the nodes.[4] Its blue, purple, or white, perfect flowers, are six-merouse with narrow petals and three stamens. The nearly 1 inch wide flowers are subtended by a spathe.[4] The flowering period is very brief subject to the correct environmental conditions,[5] and can occur from May to November. The flowers open early in the morning and wither by noon.[4]
Distribution and habitat
Heteranthera limosa grows in shallow water with the best growth in water that is less than 5cm deep; it is also found immersed at pond edges and in roadside ditches.[6] It is found growing in Arizona, Arkansas, California, Colorado, Florida, Illinois, Iowa, Kansas, Kentucky, Louisiana, Mississippi, Missouri, Nebraska, New Mexico, Oklahoma, South Dakota, Tennessee, Texas, Mexico, West Indies, Central America, and South America (Argentina, Bolivia, Brazil, Colombia, Ecuador, Paraguay, Venezuela).[6]
In Minnesota this species is at the northern limit of its natural distribution where it is found in the southwestern corner of the state, it occurs in shallow vernal pools that form from water that seeps between rock layers that includes Sioux quartzite; it is found in association with other rare species in the state such as Isoetes melanopoda, Plantago elongata, and Cyperus acuminatus.[5] In Minnesota it is listed as a threatened species, where it is rare and limited to specific unusual microhabitats.[2]
References
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Heteranthera limosa: Brief Summary
provided by wikipedia EN
Heteranthera limosa is an annual flowering plant in the water hyacinth family known by the common names ducksalad and blue mudplantain. It grows in shallow water or on mud. It is considered a threatened species in parts of the central United States, and an invasive species weed in California, where it is a nuisance in rice paddies. It is also occasional in Florida waterways.
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