About Rotala ramosior (L.) Koehne
Rotala ramosior (L.) Koehne is a species of flowering plant in the loosestrife family, commonly called lowland rotala. It is an aquatic or semiaquatic plant native to North America, where it grows in lakes, streams, and irrigation ditches. Its branching stems reach approximately 40 cm in length. The leaves are decussate, arranged oppositely in perpendicular pairs along the stems. They range in shape from linear to lance-shaped to oval, and grow up to 5 cm long. Flowers grow singly in the leaf axils. Each flower has triangular sepals with long, narrow appendages, and usually four tiny petals that come in shades from pink to white. This plant is sometimes cultivated in aquariums.