Polygonum douglasii Greene

Native to:

Alberta, Arizona, British Columbia, California, Colorado, Idaho, Iowa, Manitoba, Mexico Northwest, Michigan, Minnesota, Montana, Nebraska, Nevada, New Brunswick, New Hampshire, New Mexico, New York, Ontario, Oregon, Québec, Saskatchewan, South Dakota, Utah, Vermont, Virginia, Washington, Wyoming, Yukon

Introduced into:

Maryland

POWO follows these authorities in accepting this name:

• Ackerfield, J. (2015). Flora of Colorado: 1-818. BRIT Press.
• Allred, K.W. (2012). Flora Neomexicana, ed. 2, 1: 1-599. Range Science Herbarium, Las Cruces, New Mexico.
• Bennett, B.A., Catling, P.M., Cody, W.J. & Argus, G.W. (2010). New records of vascular plants in the Yukon territory VIII. Canadian Field-Naturalist 124: 1-27.
• Flora of North America Editorial Committee (2005). Flora of North America North of Mexico 5: 1-656. Oxford University Press, New York, Oxford.
• Gilman, A.V. (2015). New flora of Vermont. Memoirs of the New York Botanical Garden 110: 1-614.
• Knapp, W.M. & Naczi, R.F.C. (2021). Vascular plants of Maryland, USA. A comprehensive account of the state's botanical diversity. Smithsonian Contributions to Botany 113: 1-151.
• Larson, J., Reif, B., Nelson, B.E. & Hartman, R.L. (2014). Floristic studies in North Central New Mexico, U.S.A. the Sange de Cristo mountains. Journal of the Botanical Research Institute of Texas 8: 271-303.
• Villaseñor, J.L. (2016). Checklist of the native vascular plants of Mexico. Revista Mexicana de Biodiversidad 87: 559-902.

Kew Backbone Distributions

• Ackerfield, J. (2015). Flora of Colorado: 1-818. BRIT Press.
• Bennett, B.A., Catling, P.M., Cody, W.J. & Argus, G.W. (2010). New records of vascular plants in the Yukon territory VIII. Canadian Field-Naturalist 124: 1-27.
• Flora of North America Editorial Committee (2005). Flora of North America North of Mexico 5: 1-656. Oxford University Press, New York, Oxford.
• Gilman, A.V. (2015). New flora of Vermont. Memoirs of the New York Botanical Garden 110: 1-614.
• Knapp, W.M. & Naczi, R.F.C. (2021). Vascular plants of Maryland, USA. A comprehensive account of the state's botanical diversity. Smithsonian Contributions to Botany 113: 1-151.
• Larson, J., Reif, B., Nelson, B.E. & Hartman, R.L. (2014). Floristic studies in North Central New Mexico, U.S.A. the Sange de Cristo mountains. Journal of the Botanical Research Institute of Texas 8: 271-303.
• Villaseñor, J.L. (2016). Checklist of the native vascular plants of Mexico. Revista Mexicana de Biodiversidad 87: 559-902.