Polygonum douglasii

Taxonavigation

Taxonavigation: Caryophyllales
Classification System: APG IV Superregnum: Eukaryota Cladus: Diaphoretickes Cladus: CAM Cladus: Archaeplastida Regnum: Plantae Cladus: Angiosperms Cladus: Eudicots Cladus: Core eudicots Ordo: Caryophyllales

Polygonum douglasii Greene in Bull. Calif. Acad. Sci. 1: 125 (1885)

Heterotypic
- Polygonum buxiforme f. montanum Brenckle in Phytologia 3: 363 (1950)
- Polygonum buxiforme var. montanum (Brenckle) R.J.Davis in Madroño 11: 143 (1951)
- Polygonum commixtum Greene in Pl. Baker. 3: 14 (1901)
- Polygonum douglasii var. latifolium (Engelm.) Greene in Bull. Calif. Acad. Sci. 1: 125 (1885)
- Polygonum douglasii var. montanum Small in Mem. Dept. Bot. Columbia Coll. 1: 118 (1895)
- Polygonum howellii Greene in Pl. Baker. 3: 14 (1901)
- Polygonum montanum (Small) Greene in Pl. Baker. 3: 13 (1901)
- Polygonum pannosum S.S.Sharp ex A.Nelson in Bot. Gaz. 56: 64 (1913)
- Polygonum tenue var. commune Engelm. in Proc. Acad. Nat. Sci. Philadelphia 15: 75 (1863)
- Polygonum tenue var. latifolium Engelm. in Proc. Acad. Nat. Sci. Philadelphia 15: 75 (1863)
- Polygonum vagans Greene in Pittonia 5: 202 (1903)

Native distribution areas:

Continentalː Northern America
- Regionalː Canada
  - Alberta, British Columbia, Manitoba, New Brunswick, Ontario, Québec, Saskatchewan, Yukon
- Regionalː Central USA
  - Arizona, Colorado, Idaho, Iowa, Michigan, Minnesota, Montana, Nebraska, Nevada, New Hampshire, New Mexico, South Dakota, Utah, Vermont, Wyoming
- Regionalː Western USA
  - California, Oregon, Washington
- Regionalː Mexico
  - Mexico Northwest
- Regionalː Eastern USA
  - New York, Virginia
- Introduced into:
  - Maryland

Greene, E.L. 1885. Studies in the botany of California and parts adjacent. I. Bulletin of the California Academy of Sciences (3): 66–127. BHL Reference page. 1:125.

Flora of North America Editorial Committee (2005). Flora of North America North of Mexico 5: 1-656. Oxford University Press, New York, Oxford.
Villaseñor, J.L. 2016. Checklist of the native vascular plants of Mexico. Revista Mexicana de Biodiversidad 87: 559–902. DOI: 10.1016/j.rmb.2016.06.017 Online PDF Reference page.

Govaerts, R. et al. 2026. Polygonum douglasii in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2026 July 08. Reference page.
International Plant Names Index. 2026. Polygonum douglasii. Published online. Accessed: July 08 2026. Reference page.
USDA, ARS, Germplasm Resources Information Network. Polygonum douglasii in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 09-Oct-10. Reference page.