Annual herb, 60 ~ 90 cm tall, with scattered glandular spots and hairs all over the plant. The stem is erect, or the lower part is prostrate, usually purplish red, with swollen nodes, alternate leaves and short stalks. The leaf blade is broadly lanceolate, the apex is tapered, the base is wedge-shaped, both sides have coarse hairs, the upper part is dark green, there are splayed black spots, the stipules are membranous, and the edges are long bristles. Spikes are born at the top of branches, pedicels are slender, 6 ~ 12 cm long, and flowers droop sparsely; Perianth 5 deeply divided, white, with scattered green glandular spots, the upper part is red.
Chinese name: Polygonum hydropiper
Latin scientific name: Polygonum.
Nicknames: Hemibarbus angustifolia, Polygonum hydropiper, Polygonum hydropiper, Chili grass.
Two-name method: Polygonum glaucum
Field: the field of plants
Door: Magnolia Plant Door
Category: Magnoliaceae
Objective: Polygonum.
Family: Polygonaceae
Genus: Polygonum
Type: Polygonum hydropiper
Distribution area: Habitat distribution: Born near the water, in wet places. Distributed in most parts of the country.