Koenigia davisiae (Davis' Knotweed) is a species of perennial herb in the family Polygonaceae. They have a self-supporting growth form. They are native to The Contiguous United States, Western North America, and Asia. They have simple, broad leaves and purple flowers. Flowers are visited by Didea fuscipes. Individuals can grow to 0.4 m.
EOL has data for 68 attributes, including: