| Polygonum californicum | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae |
| (unranked): | Angiosperms |
| (unranked): | Eudicots |
| (unranked): | Core eudicots |
| Order: | Caryophyllales |
| Family: | Polygonaceae |
| Genus: | Polygonum |
| Species: | P. californicum |
| Binomial name | |
| Polygonum californicum Meisn. |
|
Polygonum californicum is a species of flowering plant in the knotweed family known by the common name California knotweed. It is native to the west coast of the United States from Washington to central California, where it can be found in many types of open habitat.
Polygonum californicum is an annual herb producing a slender, angled stem which grows erect to a maximum height near 40 centimeters. The narrow, pointed leaves are mostly located on upper branches of the stem. The leaves have fringed, bristle-tipped stipules attached to their bases. Solitary white or pink flowers occur in upper leaf axils.