Polygonum sawatchense explained

Polygonum sawatchense is a North American species of plants in the buckwheat family. It in the western United States and western Canada, from the Pacific Coast to the western Great Plains, so from British Columbia south to California and east as far as New Mexico, Colorado, Saskatchewan, and the Dakotas.^{[1] [2]}

Polygonum sawatchense is a branching, hairless herb up to 50cm (20inches) tall. Leaves are narrow, up to 45mm long. Flowers are green, red, or white, in elongated arrays.^{[3] [4] [5]}

Species is named for the Sawatch Range in Colorado, where Brandegee collected the type specimen.>^[4]

Subspecies^{[2] [3]}

• Polygonum sawatchense subsp. oblivium Costea & Tardif - British Columbia, Washington, Oregon, California, Idaho, Nevada
• Polygonum sawatchense subsp. sawatchense - from Alberta + Saskatchewan south to Arizona + New Mexico

Notes and References

1. http://bonap.net/MapGallery/County/Polygonum%20sawatchense.png Biota of North America Program 2014 county distribution map, Polygonum sawatchense
2. https://www.biodiversitylibrary.org/page/9310011#page/1670/mode/1up Costea, Mihai & Tardif, Francois J. 2003. Sida 20(4): 1631-1640
3. http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250060758 Flora of North America, Polygonum sawatchense Small, 1893.
4. https://www.biodiversitylibrary.org/page/703302#page/268/mode/1up Small, John Kunkel 1893. Bulletin of the Torrey Botanical Club 20(5): 213–214
5. https://www.biodiversitylibrary.org/page/703302#page/290/mode/1up Small, John Kunkel 1893. Bulletin of the Torrey Botanical Club 20(5): plate CLVI (156)