Myriophyllum aquaticum (Vell.) Verdc.

This species is accepted, and its native range is Central & S. Tropical America. It is used as a medicine, has environmental uses and for food.

[CPLC]

Bernal, R., Gradstein, S.R. & Celis, M. (eds.). 2015. Catálogo de plantas y líquenes de Colombia. Instituto de Ciencias Naturales, Universidad Nacional de Colombia, Bogotá. http://catalogoplantasdecolombia.unal.edu.co

Distribution: Cultivada en Colombia; Alt. 2100 - 3300 m.; Andes.
Morphology General Habit: Hierba, acuática

[FTEA]

Haloragaceae, R. Boutique (Jardin botanique national de Belgique) & B. Verdcourt (Royal Botanic Gardens, Kew). Flora of Tropical East Africa. 1973

Morphology General Habit: Aquatic herb, either growing in water, with most of the upper leafy parts above the water-level, or sometimes on mud; stems 0.45–1.2 m. long, simple or sparsely branched, puberulous or glabrous, with up to 1/4 emerging, mostly several from a creeping rhizome.
Morphology Leaves: Leaves all pinnatipartite, in whorls of 4–6, 0.6–2.5(–3) cm. long, often puberulous; lobes alternate or subopposite, 15–17(–35), linear-subulate, 1.8–5(–7) mm. long, 0.13–0.3 mm. wide, ± acute, {PAGE}{PAGE}entire or denticulate.
Morphology Reproductive morphology Flowers: Flowers unisexual, monoecious or mostly dioecious, solitary in the leaf-axils, the lower flowers ♀ and the upper ♂. Male flowers:bracteoles 2, linear, 1.5–3 mm. long, 0.1 mm. wide, white, very finely bifid or trifid; pedicel and calyx-tube together at first 1.3–2.5 mm. long, tenuous, later 3.5–5 mm. long, 2 mm. thick; lobes 4, oblong-lanceolate or narrowly triangular, 0.7–1.8 mm. long, 0.4 mm. wide, at first erect, later spreading, minutely serrate; petals 4, boat-shaped, 2.5–5 mm. long, 0.8–1.3 mm. wide, clawed; stamens 4–8, filaments 0.15–5 mm. long; anthers 1.9–3.5 mm. long, 0.4 mm. wide; sometimes minute rudiments of styles present. Female flowers:bracteoles 2, linear, 0.7–1.2 mm. long, 0.15 mm. wide, acute, sub-membranous, toothed at the middle; pedicels 0.3–0.7 mm. long, thick; calyx-tube 0.5–1 mm. long, 0.5–0.6 mm. wide, 4-angled, 4-grooved, the 4 lobes linear, (0.3–)0.5–1 mm. long, at first erect, later reflexed, acute, entire, minutely serrulate or pinnately ± 5-lobed; petals and stamens lacking; stigmas 4, short, 0.45–0.7 mm. long, at first erect, later decurved, capitate or claviform, shortly papillose.
sex Male: Male flowers:bracteoles 2, linear, 1.5–3 mm. long, 0.1 mm. wide, white, very finely bifid or trifid; pedicel and calyx-tube together at first 1.3–2.5 mm. long, tenuous, later 3.5–5 mm. long, 2 mm. thick; lobes 4, oblong-lanceolate or narrowly triangular, 0.7–1.8 mm. long, 0.4 mm. wide, at first erect, later spreading, minutely serrate; petals 4, boat-shaped, 2.5–5 mm. long, 0.8–1.3 mm. wide, clawed; stamens 4–8, filaments 0.15–5 mm. long; anthers 1.9–3.5 mm. long, 0.4 mm. wide; sometimes minute rudiments of styles present.
sex Female: Female flowers:bracteoles 2, linear, 0.7–1.2 mm. long, 0.15 mm. wide, acute, sub-membranous, toothed at the middle; pedicels 0.3–0.7 mm. long, thick; calyx-tube 0.5–1 mm. long, 0.5–0.6 mm. wide, 4-angled, 4-grooved, the 4 lobes linear, (0.3–)0.5–1 mm. long, at first erect, later reflexed, acute, entire, minutely serrulate or pinnately ± 5-lobed; petals and stamens lacking; stigmas 4, short, 0.45–0.7 mm. long, at first erect, later decurved, capitate or claviform, shortly papillose.
Morphology Reproductive morphology Fruits: Fruit ovoid, 1.8 mm. long, 1.2 mm. in diameter, papillose-punctate, eventually dividing into 4 parts.
Figures: Fig. 3.
Habitat: In artificial ponds and lakes, also by river banks, presumably originally introduced as an aquarium plant; 900–1650 m.
Distribution: K4 T3 naturalized or casual in parts of Europe and S. Africa

[FZ]

Haloragaceae, E. J. Mendes. Flora Zambesiaca 4. 1978

Morphology General Habit: Aquatic herb, usually submerged, with the upper part floating at the surface or sometimes creeping on to sandy or muddy banks; rhizome rooted; stems up to 1·2 m. long, simple or sparsely branched at the base.
Morphology Leaves: Leaves all pinnatisect, in alternating whorls of (4)5–6, densely papillose (when dry simulating puberulence), usually much longer than internodes, their bases flanked by 2–3 linear, mostly recurved, deciduous stipule-like outgrowths; leaf-segments 8–16(30) on each side, linear-subulate, with a mucronulate apex; leaf-base dilated, almost concealing the stem at least at upper nodes.
Morphology Reproductive morphology Flowers: Flowers unisexual, solitary in the middle and upper leaf-axils; bracteoles subulate, with 1–2 lateral laciniae in male, laterally 1–2-dentate in female.
Morphology Reproductive morphology Flowers Corolla: Petals 4, c. 4 mm. long, absent in female.
Morphology Reproductive morphology Flowers Androecium Stamens: Stamens usually 8, rarely less; anthers c. 3 mm. long; filaments up to 5 mm. long.
Morphology Reproductive morphology Flowers Gynoecium Stigma: Stigmas 4, shortly papillose.
Morphology Reproductive morphology Fruits: Fruit c. 1·8 x 1·2 mm., ovoid, longitudinally 4-sulcate, papillose-punctate.

[UPFC]

Distribution: Biogeografic region: Andean. Elevation range: 2100–3300 m a.s.l. Cultivated in Colombia. Native to Colombia. Colombian departments: Antioquia, Bogotá DC, Boyacá, Cundinamarca, Nariño.
Habit: Herb, Aquatic.
Ecology: Habitat according IUCN Habitats Classification: forest and woodland, shrubland, native grassland, wetlands (inland), artificial - terrestrial.

[UPB]

The Useful Plants of Boyacá project

Ecology: Alt. 2100 - 3300 m.
Morphology General Habit: Aquatic herb.
Distribution: Cultivated in Colombia.

[UPFC]

Use Environmental: Environmental uses.
Use Food: Used for food.
Use Medicines: Medical uses.

[UPB]

Use Environmental: Environmental uses (State of the World's Plants 2016).

Doubtfully present in:

Guyana

Native to:

Argentina Northeast, Argentina Northwest, Bolivia, Brazil Northeast, Brazil South, Brazil Southeast, Brazil West-Central, Chile Central, Chile North, Chile South, Colombia, Costa Rica, French Guiana, Nicaragua, Paraguay, Peru, Uruguay, Venezuela

Introduced into:

Alabama, Arizona, Arkansas, Austria, Bangladesh, Belgium, British Columbia, California, Canary Is., Cape Provinces, Connecticut, Delaware, Denmark, District of Columbia, Dominican Republic, Florida, France, Free State, Georgia, Germany, Great Britain, Hawaii, Idaho, Illinois, Indiana, Japan, Jawa, Kansas, Kentucky, Kenya, KwaZulu-Natal, Lesotho, Louisiana, Madagascar, Madeira, Maryland, Massachusetts, Mexico Southwest, Minnesota, Mississippi, Missouri, Montana, Nansei-shoto, New Jersey, New Mexico, New South Wales, New York, New Zealand North, North Carolina, Northern Provinces, Ohio, Oklahoma, Oregon, Palestine, Pennsylvania, Philippines, Portugal, Queensland, Rhode I., Romania, South Carolina, Spain, Switzerland, Taiwan, Tanzania, Tasmania, Tennessee, Texas, Victoria, Virginia, Washington, West Virginia, Western Australia, Windward Is., Wisconsin, Zimbabwe