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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

Spindleroot is an aquatic or wetland species renowned for its upright stems and lance-shaped leaves that often appear in opposing pairs. The plant's propensity for wet environments is showcased by its delicate, yellow flowers that bloom directly from the stem. Adapted to thrive along still or slow-moving water bodies, spindleroot supports a diverse ecosystem and adds a touch of vibrant color to its habitats.

Narrowleaf primrose-willow flaunts slender, willow-like leaves along erect stems, which thrive in wet, boggy habitats nurturing its growth. Its yellow flowers bloom modestly yet distinctively above the water's surface, signaling narrowleaf primrose-willow's adaptation to aquatic ecosystems. The linear foliage reflects narrowleaf primrose-willow's simplicity, while its aquatic affinity reveals a specialized ecological niche.

Manyfruit primrose-willow is a freshwater aquatic plant found in wetlands and along the edges of streams and ponds. This species thrives in moist soils, showcasing a robust adaptability to fluctuating water levels. It features narrow, lance-shaped leaves and small yellow flowers, each with four delicate petals. The plant's ability to proliferate rapidly allows it to form dense colonies, providing a unique habitat for aquatic wildlife.

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.

Ludwigia peploides subsp. stipulacea is a water-loving perennial with a creeping habit, often forming dense mats on the surface of freshwater environments. Its vibrant green leaves are oval-shaped with a glossy surface, while the plant is distinguished by bright yellow five-petaled flowers that bloom in warm seasons, inviting a variety of pollinators. Rooted in muddy substrates, ludwigia peploides subsp. stipulacea thrives in wetlands and along the margins of ponds, playing a role in water purification and providing habitat for aquatic wildlife.

Ludwigia prostrata is a low-growing aquatic herb that thrives in wet environments. Its sprawling stems are hallmarks of this plant, often rooting at the nodes. The small oval leaves are arranged oppositely, creating a dense, green carpet in marshy territories. The plant's yellow flowers, which bloom in warm months, attract pollinators and add a splash of color to the water's edge.

Shrubby primrose-willow is a robust, perennial wetland herb with a woody base and erect stems. Its lance-shaped leaves and bright yellow flowers appear primarily in wet or swampy areas, reflecting shrubby primrose-willow's affinity for moist environments. These features, along with the plant's ability to spread through both seeds and stem fragments, contribute to its tenacious growth and survival in its native habitat.

Curtiss' primrose-willow is a freshwater aquatic plant that thrives in the slow-moving waters of southeastern United States wetlands. Its delicate, yellow flowers emerge above the water's surface, supported by slender stems with lance-shaped leaves. The interplay between sunlight and shadow in its habitat enables curtiss' primrose-willow to photosynthesize efficiently, vital for its growth in these competitive ecosystems.

Seaside primrose-willow typically flourishes in coastal environments where it adapts to the sandy and salty conditions. This hardy perennial exhibits a robust stature with vibrant green, lance-shaped leaves. Its stems often attain a reddish hue, especially when exposed to full sunlight. The distinct yellow flowers emerge in warmer months, offering a stark contrast against the foliage, and are a key trait for species recognition.

Ludwigia sedoides, with its striking mosaic of diamond-shaped leaves, forms a floating rosette on calm freshwater surfaces. This radiant red and green mat provides shelter for aquatic creatures and thrives under the full sun, symbolizing the seamless integration of flora in the water's ecosystem.

Winged primrose-willow is a visually striking aquatic herb with winged stems, known for its distinctive oar-like leaves. The leaves typically display a vibrant green color, becoming more pronounced in well-lit environments. Delicate yellow flowers emerge above water, with four petals each – a feature attracting pollinators. Adapted to marshy or wetland habitats, winged primrose-willow thrives in standing, slow-moving waters, contributing to its ecosystem by stabilizing substrates and providing habitat.

Savannah primrose-willow typically exhibits a slender, upright form with willow-like leaves and delicate yellow flowers. These flowers feature four distinct petals, often blooming in the warmer months. Thriving in wet, marshy environments, savannah primrose-willow forms dense clumps that can both stabilize the soil and provide habitat for aquatic wildlife. Its narrow leaves and elongated stalks are adapted for survival in fluctuating water levels.

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.

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.

Smallfruit primrose-willow is a freshwater aquatic plant distinguished by its small, elliptical leaves and petite, yellow flowers. This modest greenery thrives in still or slow-moving waters, embracing a semi-submerged existence that adapts well to wetland habitats. Smallfruit primrose-willow’s compact fruit capsules are a key feature, which, along with its tendency to form dense colonies, plays a role in its survival and spread.