Myriad Botanical Gardens - Oklahoma City, USA

Common name: Giant Knotweed

Family: Polygonaceae (Knotweed Family)

Distribution: Asia

Hardiness: 4a

Life form: Perennial plant

Comments: This species of Persicaria is a shrubby, clump-forming perennial featuring plumes of creamy white flowers reminiscent of goat's beard (Aruncus dioecus) which bloom throughout the summer atop leafy stems typically rising 3'-5' tall. Lance-shaped dark green leaves.