Botanical name: Persicaria hydropiper Family: Polygonaceae (Knotweed family)
Synonyms: Polygonum hydropiper
Water pepper is an annual herb, about 1-2 ft tall, found growing in damp places and shallow water. Leaves are about 5-10 cm long, lanceshaped, smooth along the margins, and usually hairless. Leaves are tapering to both ends, the upper almost stalkless, but not stem-clasping. Greenish-pink flowers are about 4 mm across when open. Flower spikes more than 3 times as long as broad, and interrupted so that some flowers or small groups of flowers are somewhat isolated from the rest. Water Pepper is found in the Himalayas, at altitudes of 900-2300 m. It is also found in other parts of India. Flowering: April-September.
Identification credit: Gurcharan Singh
The flower labeled Water Pepper is ...