''Polygonum austiniae'', common name Mrs. Austin's knotweed, is a plant species in the

buckwheat family The Polygonaceae are a family of flowering plants known informally as the knotweed family or smartweed—buckwheat family in the United States. The name is based on the genus ''Polygonum'', and was first used by Antoine Laurent de Jussieu in 1789 ...

. It is native to western Canada and the western United States, from Alberta and British Columbia south as far as California, Nevada, and Wyoming. ''Polygonum austiniae'' is an branching herb up to tall.Flora of North America, ''Polygonum austiniae'' Greene, 1885. (as ''austinae).'' Mrs. Austin's knotweed
/ref>Greene, Edward Lee. 1885. Bulletin of the California Academy of Sciences 1(4A): 212
''Polygonum austinae''

References

austiniae Flora of Western Canada Flora of the Western United States Flora of California Plants described in 1885 Taxa named by Edward Lee Greene {{Polygonaceae-stub