Koenigia phytolaccifolia

Koenigia phytolaccifolia (synonym Aconogonon phytolaccifolium) is a species of flowering plant in the knotweed family, known by the common name poke knotweed.

Description
Koenigia phytolaccifolia is a perennial herb up to 200 cm tall. The lance-shaped or pointed oval leaves are 10 to 20 centimeters long and borne on petioles. The leaves have large stipules which form reddish ochrea up to 3 cm long. The inflorescence is a long array of branching cluster of many white or greenish flowers. Each flower is about 4 mm wide and has tiny protruding stamens tipped with yellow or pink anthers.

Distribution
Koenigia phytolaccifolia is native to the western United States: California, Oregon, Washington, Nevada, Idaho, and Montana.