Native Plants
Search for native plants by scientific name, common name or family. If you are not sure what you are looking for, try the Combination Search or our Recommended Species lists.
Polygonum shastense
Polygonum shastense W.H. Brewer
Shasta Knotweed
Polygonaceae (Buckwheat family)
Synonym(s):
USDA Symbol: POSH
USDA Native Status: L48 (N)
From the Image Gallery
No images of this plant
Plant Characteristics
Duration: PerennialHabit: Subshrub , Shrub
Fruit Type: Achene
Size Notes: Up to about 16 inches tall.
Bloom Information
Bloom Color: White , PinkBloom Time: Jul , Aug , Sep
Distribution
USA: CA , NV , ORNative Habitat: Rocky or gravelly slopes.
Web Reference
Webref 30 - Calflora (2018) CalfloraWebref 3 - Flora of North America (2014) Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.
Webref 23 - Southwest Environmental Information Network (2009) SEINet - Arizona Chapter
Additional resources
USDA: Find Polygonum shastense in USDA PlantsFNA: Find Polygonum shastense in the Flora of North America (if available)
Google: Search Google for Polygonum shastense
Metadata
Record Modified: 2020-11-12Research By: CBR