Polygonum_shastense
Polygonum shastense
Species of flowering plant
Polygonum shastense is a species of flowering plant in the knotweed family known by the common name Shasta knotweed. It is native to sections of southwestern Oregon, northwestern Nevada, and northern and central California,[1] where it grows in rocky and gravelly mountainous habitat up to 3300 meters (11,000 feet) elevation.[2] It is most common in the Sierra Nevada.[3] The species name refers to its occurrence on Mount Shasta in Shasta County, California.[4]