The open plant encyclopedia
Snap a photo or search by any name to see how to care for it, where it comes from, whether it's safe, and a 3D model you can turn.
The plants people record most in your country, and ones that grow there wild.
Filter by what you want to do, shape, origin, country, care and safety.
Persicaria barbata
Also called Water Milkwort
Persicaria barbata, commonly known as bearded knotweed, is a species of flowering plant in the family Polygonaceae. It is native to the Arabian Peninsula and much of tropical and subtropical Asia, and has also been introduced to parts of Africa and the Pacific islands. The plant typically grows in seasonally dry tropical regions, where it occurs as an erect or sometimes prostrate annual herb, 30–60 cm tall, with hairless, line-grooved stems and lance-shaped leaves up to 15 cm long. In some descriptions it is noted as a perennial, producing robust, loosely branched stems 40–90 cm tall from a creeping rhizomatous rootstock.
Amphibious Bistort · Halberdleaf tearthumb · Smart Weed · Two-horned smartweed · Prickly Smartweed · Pink Headed Knotweed · Persicaria cespitosa · Chinese Knotweed · Slender Knotweed · Persicaria dichotoma · Tall Knotweed · Far Eastern Smartweed
Text excerpted from the Wikipedia article Persicaria barbata by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
