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Polygonum douglasii ssp. spergulariiforme
Polygonum douglasii Greene ssp. spergulariiforme (Meisn. ex Small) J.C. Hickman
Autumn Knotweed, Fall Knotweed, Scatter Knotweed, Spurry Knotweed
Polygonaceae (Buckwheat family)
Synonym(s): Polygonum spergulariiforme
USDA Symbol: PODOS2
USDA Native Status: L48 (N), CAN (N)
From the Image Gallery
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Plant Characteristics
Duration: AnnualHabit: Herb
Fruit Type: Achene
Size Notes: Up to about 20 inches tall.
Bloom Information
Bloom Color: White , PinkBloom Time: Jun , Jul , Aug , Sep , Oct
Distribution
USA: CA , ID , MT , OR , WA , WYCanada: BC , SK
Native Habitat: Moist to dry, open rocky places, including serpentine.
National Wetland Indicator Status
Region: | AGCP | AK | AW | CB | EMP | GP | HI | MW | NCNE | WMVE |
Status: | FACU | FACU | FACU |
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 douglasii ssp. spergulariiforme in USDA PlantsFNA: Find Polygonum douglasii ssp. spergulariiforme in the Flora of North America (if available)
Google: Search Google for Polygonum douglasii ssp. spergulariiforme
Metadata
Record Modified: 2020-11-12Research By: CBR