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Primrose-Willow

Botanical name: Ludwigia

Primrose-Willow
Botanical name: Ludwigia
Primrose-Willow (Ludwigia)

Description

Primrose-Willow are a widespread genus of tropical and subtropical aquatic plants. Many species are noxious and harmful to native aquatic plant life, due to their dense, fast-growing nature. In some areas, some species of this genus are on the plant quarantine list, banned from being transported, bought or sold.

Species of Primrose-Willow

Large-flower primrose-willow

Large-flower primrose-willow

Large-flower primrose-willow (Ludwigia grandiflora) is indigenous to South America and parts of North America. This aquatic plant is invasive in every other part of the world where it has been introduced and has caused ecological devastation on an epic scale. It grows with frightening rapidity, covers vast areas, and forms exceedingly thick mats. All of this lush growth has the tendency to smother native species.
Seedbox

Seedbox

Seedbox (Ludwigia alternifolia) is an herbaceous perennial that blooms in summer with a showy display of bright yellow flowers. Grows in full sun to partial shade and prefers medium to wet soil. Common in marshes it is a perfect choice for a rain garden or to use as a water plant. Its name comes from its box-like seed capsules which split open when ripe to release an abundance of seeds.
Wingleaf primrose-willow

Wingleaf primrose-willow

Wingleaf primrose-willow (Ludwigia decurrens) thrives best in environments with lots of moisture such as freshwater marshes, soggy swamps, or peat bogs. Another name for it is seedbox because of its box-shaped seed capsules. Ducks and other aquatic birds enjoy feasting on these seeds.
Ludwigia prostrata

Ludwigia prostrata

Ludwigia prostrata are a widespread genus of tropical and subtropical aquatic plants. Many species are noxious and harmful to native aquatic plant life, due to their dense, fast-growing nature. In some areas, some species of this genus are on the plant quarantine list, banned from being transported, bought or sold.
Ludwigia peploides subsp. stipulacea

Ludwigia peploides subsp. stipulacea

Ludwigia peploides subsp. stipulacea are a widespread genus of tropical and subtropical aquatic plants. Many species are noxious and harmful to native aquatic plant life, due to their dense, fast-growing nature. In some areas, some species of this genus are on the plant quarantine list, banned from being transported, bought or sold.
Marsh seedbox

Marsh seedbox

The marsh seedbox is an aquatic perennial herb that grows in moist to wet, flooded conditions. As a result, it is commonly planted as an aquarium plant. Several water parasites and insects feed on this plant. It is classified as invasive in Australia.
Floating Primrose Willow

Floating Primrose Willow

Another name for floating Primrose Willow (Ludwigia peploides) is creeping water primrose. This secondary name is all too apt. That's because this aquatic species native to the Americas has invaded much of the world. Wherever this noxious weed goes, waterways get clogged. France has suffered from horrible ecological devastation because of it.
Mexican Primrose-Willow

Mexican Primrose-Willow

Mexican Primrose-Willow (Ludwigia octovalvis) flourishes in tropical locations worldwide, especially in marshy areas where other plants would struggle with such saturated soil. It is unique because it has two varieties of roots: one that anchors it down into wet soil and another that acts as a little intertube to keep the plant afloat.
Anglestem primrose-willow

Anglestem primrose-willow

Ludwigia leptocarpa is also known as anglestem primrose-willow, and is native to the United States, mostly the state of Florida. It blooms yellow flowers all year long and is found growing in wetlands.
Seed box

Seed box

Seed box (Ludwigia hyssopifolia) is so-named because just one plant can produce a quarter of a million seeds. This abundance of seeds means that seed box has spread abundantly over much of the tropical and sub-tropical world, and it is classed as an invasive weed in many countries. This aggressive weed is particularly invasive in rice paddy fields. Given its fecundity, this plant has no practical use.
Peruvian Primrose-Willow

Peruvian Primrose-Willow

Peruvian Primrose-Willow (Ludwigia peruviana) is an evergreen perennial, woody shrub that attracts butterflies and will grow from 91 to 366 cm tall. It blooms year-round with bright yellow flowers that offer a dramatic display. Often seen growing in ditches and along canals. Prefers full sun to partial shade.
Cylindric-fruit primrose-willow

Cylindric-fruit primrose-willow

Cylindric-fruit primrose-willow (Ludwigia glandulosa) is a perennial plant species that grows commonly in wetland areas. Cylindric-fruit primrose-willow thrives in warm temperatures and full sunlight. This plant species is often planted in aquariums because its fibrous roots filter and oxygenate the water, providing a healthy habitat for fish.
Ludwigia grandiflora var. hexapetala

Ludwigia grandiflora var. hexapetala

Ludwigia grandiflora var. hexapetala is considered a highly invasive and damaging species in France. It grows best in freshwater lakes and slow-moving freshwater streams and rivers. Gardeners like to use it in ornamental ponds.
Shrubby primrose-willow

Shrubby primrose-willow

Shrubby primrose-willow are a widespread genus of tropical and subtropical aquatic plants. Many species are noxious and harmful to native aquatic plant life, due to their dense, fast-growing nature. In some areas, some species of this genus are on the plant quarantine list, banned from being transported, bought or sold.
Seaside primrose-willow

Seaside primrose-willow

Seaside primrose-willow are a widespread genus of tropical and subtropical aquatic plants. Many species are noxious and harmful to native aquatic plant life, due to their dense, fast-growing nature. In some areas, some species of this genus are on the plant quarantine list, banned from being transported, bought or sold.
Hairy primrose-willow

Hairy primrose-willow

Hairy primrose-willow (Ludwigia pilosa) is an aquatic plant typically found in shallow water or other wet areas. Hairy primrose-willow produces plentiful seeds that are eaten by waterfowl. Additionally, submerged portions of this plant provide habitats for invertebrates.
Savannah primrose-willow

Savannah primrose-willow

Savannah primrose-willow are a widespread genus of tropical and subtropical aquatic plants. Many species are noxious and harmful to native aquatic plant life, due to their dense, fast-growing nature. In some areas, some species of this genus are on the plant quarantine list, banned from being transported, bought or sold.
Curtiss' primrose-willow

Curtiss' primrose-willow

Curtiss' primrose-willow are a widespread genus of tropical and subtropical aquatic plants. Many species are noxious and harmful to native aquatic plant life, due to their dense, fast-growing nature. In some areas, some species of this genus are on the plant quarantine list, banned from being transported, bought or sold.
Winged primrose-willow

Winged primrose-willow

Winged primrose-willow are a widespread genus of tropical and subtropical aquatic plants. Many species are noxious and harmful to native aquatic plant life, due to their dense, fast-growing nature. In some areas, some species of this genus are on the plant quarantine list, banned from being transported, bought or sold.
Ludwigia sedoides

Ludwigia sedoides

Ludwigia sedoides are a widespread genus of tropical and subtropical aquatic plants. Many species are noxious and harmful to native aquatic plant life, due to their dense, fast-growing nature. In some areas, some species of this genus are on the plant quarantine list, banned from being transported, bought or sold.
Swamp dragon

Swamp dragon

The stem height is 30 to 70 cm standing upright or diagonally and the stem is well branched. The stem is often green and reddish with a ridge and a square cross section. There is no hair but there are rare hairs. The leaves are alternating and have a short petiole the shape is from a lanceolate shape to a long narrow egg shape the leaf edges are smooth on all edges the size is 2 to 10 cm long and the width is 6 to 25 mm. Side veins are conspicuous on the surface. The flowering period is from summer to fall with a yellow flower with a diameter of 7 to 10 mm or less in the shape of a fallen egg without a handle on the leaf buds. There are 4 petals 4 sepals 4 stamens 1 pistil and the petals are shorter than the sepals. The fruit has a stick-shaped fruit brown 1 to 3 cm long with seeds of about 0.8 to 1.4 mm in size.
Perennial water primrose

Perennial water primrose

Perennial water primrose is often found in flood plains and rice fields and is typically considered a weed. This plant can be useful in cultivation, however, as it makes a great addition to fish tanks or ponds as it's able to survive underwater.
Smallfruit primrose-willow

Smallfruit primrose-willow

Smallfruit primrose-willow are a widespread genus of tropical and subtropical aquatic plants. Many species are noxious and harmful to native aquatic plant life, due to their dense, fast-growing nature. In some areas, some species of this genus are on the plant quarantine list, banned from being transported, bought or sold.
Creeping primrose-willow

Creeping primrose-willow

This is a mat-forming perennial herb with a creeping stem up to 30 cm long, rooting at nodes which come in contact with wet substrate. The leaves are oppositely arranged and up to 4 cm or 5 cm long. The flower has four yellow colored petals no more than 3 millimeters long nested on a base of four pointed sepals which may be slightly longer.
Manyfruit primrose-willow

Manyfruit primrose-willow

Manyfruit primrose-willow are a widespread genus of tropical and subtropical aquatic plants. Many species are noxious and harmful to native aquatic plant life, due to their dense, fast-growing nature. In some areas, some species of this genus are on the plant quarantine list, banned from being transported, bought or sold.
Floating water primrose

Floating water primrose

Floating water primrose lives in swampy parts of the tropics and subtropics all over the world, but its original native territory is uncertain. As the name suggests, floating water primrose can float on water. It can quickly become a weed around irrigation channels and crops like rice or jute.
Spindleroot

Spindleroot

Spindleroot are a widespread genus of tropical and subtropical aquatic plants. Many species are noxious and harmful to native aquatic plant life, due to their dense, fast-growing nature. In some areas, some species of this genus are on the plant quarantine list, banned from being transported, bought or sold.
Narrowleaf primrose-willow

Narrowleaf primrose-willow

Narrowleaf primrose-willow are a widespread genus of tropical and subtropical aquatic plants. Many species are noxious and harmful to native aquatic plant life, due to their dense, fast-growing nature. In some areas, some species of this genus are on the plant quarantine list, banned from being transported, bought or sold.
Primrose-Willow (Ludwigia) Primrose-Willow (Ludwigia)

Scientific Classification

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