Plant Profile: Dianthera americana

Water Willow is a perennial aquatic herb that features striking white and purple flowers, which bloom from early summer through fall. Typically, only a few flowers open at once, but they are quite vibrant and have an extended blooming period. The plant is characterized by its slender, willow-like leaves, which measure between 2 to 6 inches in length.

This plant thrives in full or partial sunlight and can be found in shallow waters up to 3 feet deep, as well as in moist soils that are sandy, muddy, or gravelly. Water Willow commonly inhabits the shallow areas of ponds, streams, lakes, and rivers. It propagates through underground stems, allowing it to create extensive colonies. In these shallow waters, it serves as a sanctuary for young freshwater fish.

Pollination of the flowers is carried out by various insects, including bees, wasps, small butterflies, and skippers. Interestingly, despite its name, Water Willow is neither a woody plant nor is it related to true willows.