Houttuynia cordata, also known as fish mint, fish leaf, rainbow plant, chameleon plant, heart leaf, fish wort, Chinese lizard tail, or bishop's weed, is one of two species in the genus Houttuynia (the other being H. emeiensis). It is a flowering plant native to Japan, Korea, southern China, and Southeast Asia. It grows in moist, shady locations.

Houttuynia cordata is a herbaceous perennial plant that can grow to 0.6–1 metre (2.0–3.3 ft), spreading up to 1 metre (3.3 ft). The proximal part of the stem is trailing and produces adventitious roots, while the distal part of the stem grows vertically. The leaves are alternate, broadly heart-shaped, 4–9 cm (1.6–3.5 in) long and 3–8 cm (1.2–3.1 in) broad. Its flowers are greenish-yellow and borne on a terminal spike 2–3 cm (0.79–1.18 in) long with four to six large white basal bracts. It normally blooms in the summer.

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