Nymphoides geminata, commonly known as Entire Marshwort, is a deciduous perennial herb native to still or slow-moving freshwater bodies such as ponds, ditches, and shallow lakes in Eastern Australia. It has a floating habit with leaves that sit on the water surface, resembling those of water lilies. The plant reaches a height of about 0.3-0.5 feet (0.09-0.15 meters) and can spread widely across the water surface. It produces small, star-shaped yellow flowers from spring to autumn, which are quite showy and add aesthetic value to water gardens.

Entire Marshwort is valued for its ornamental flowers and its ability to provide habitat for aquatic wildlife. It is often used in water gardens and ponds for its decorative appearance and surface coverage, which can reduce algae growth by shading the water. It prefers full sun to part shade, requires standing water to grow, and is tolerant of a range of pH levels in the water. While it can be a beautiful addition to water features, it is potentially invasive outside its native range and can outcompete native aquatic plants. Gardeners should ensure it is not a regulated or invasive species in their region before cultivation.CC BY-SA 4.0