Himalayan knotweed
(Koenigia polystachya (Wall. ex Meisn.) T. M. Schust. & Reveal)

This species is Introduced in the United States

States Counties Points List Species Info
Appearance: Rhizomatous perennial herb. Thick, erect, hollow stems that grow over 1 meter (3.3 ft) tall. Leaves are hairy and up to 20 cm (8 in) long. Flowers are white and in lacy clusters.

Forms dense colonies. Can spread by seed or by stem pieces with rooting nodes.

Maps


EDDMapS Distribution

EDDMapS Distribution - This map is incomplete and is based only on current site and county level reports made by experts, herbaria, and literature. For more information, visit www.eddmaps.org

State Regulated List

State Lists - This map identifies those states that have this species on their invasive species list or law.

Taxonomic Rank

Domain: Eukarya
Kingdom: Plantae
Phylum: Magnoliophyta
Class: Magnoliopsida
Superorder: Caryophyllanae
Order: Caryophyllales
Family: Polygonaceae
Genus: Koenigia
Koenigia polystachya (Wall. ex Meisn.) T. M. Schust. & Reveal