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Polygonum douglasii ssp. johnstonii
Polygonum douglasii Greene ssp. johnstonii (Munz) J.C. Hickman
Johnston's Knotweed
Polygonaceae (Buckwheat family)
Synonym(s): Polygonum douglasii var. johnstonii, Polygonum sawatchense, Polygonum sawatchense ssp. oblivium, Polygonum triandrum, Polygonum utahense
USDA Symbol: PODOJ2
USDA Native Status: L48 (N), CAN (N)
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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 , Red , Pink , GreenBloom Time: Jun , Jul , Aug
Bloom Notes: Greenish or reddish with white or pink margins.
Distribution
USA: AZ , CA , CO , ID , MT , ND , NE , NM , NV , OR , SD , UT , WA , WYCanada: AB , BC , SK
Native Habitat: Dry meadows, pastures, sagebrush and forests on sandy, gravelly or rocky substrates.
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. johnstonii in USDA PlantsFNA: Find Polygonum douglasii ssp. johnstonii in the Flora of North America (if available)
Google: Search Google for Polygonum douglasii ssp. johnstonii
Metadata
Record Modified: 2020-11-12Research By: CBR