What is the difference between hot polygonum and red polygonum

1. Leaf Difference

The leaves of Polygonum hydropiper are lanceolate or elliptic-lanceolate, 4 to 8 cm long and about 0.5 to 2.5 cm wide. The leaf apex gradually becomes pointed, the base of the leaf is wedge-shaped, the edge is entire, both sides of the leaf are glabrous, with small brown spots, and the petiole is 4 to 8 mm long.

The leaves of Polygonum multiflorum are broadly ovate, ovate-lanceolate or broadly elliptic, 10 to 20 cm long and 5 to 12 cm wide, gradually becoming pointed at the apex, with a rounded or nearly cordate base and entire margins.

2. Flower Differences

The inflorescence of Polygonum hydropiper is spike-shaped, terminal or axillary, 3 to 8 cm long, usually drooping, with sparse flowers and discontinuous at the bottom. The bracts of the flowers are funnel-shaped, 2 to 3 mm long, and green. The flowers are green with 5 deep lobes and white or light pink on top.

The inflorescence of Polygonum multiflorum is spike-shaped, terminal or axillary, 3 to 7 cm long, with dense, slightly drooping flowers, usually several of which form a cone shape, and the flowers are light pink or white.