Polygonum nuttallii is a North American species of flowering plant in the buckwheat family known by the common name Nuttall's knotweed. It grows in the Pacific Northwest, in British Columbia, Washington, and Oregon.Biota of North America Program 2014 county distribution map
Polygonum nuttallii is an herb up to tall. Stems are thin and wiry. Flowers are white or pink.Flora of North America, Polygonum nuttallii Small, 1895. Nuttall's knotweed Small, John Kunkel. 1895. Memoirs from the Department of Botany of Columbia College. vol.I. Monograph of the North American Species of the genus Polygonum page 132 description in EnglishSmall, John Kunkel. 1895. Memoirs from the Department of Botany of Columbia College. vol.I. Monograph of the North American Species of the genus Polygonum plate 53 line drawing of Polygonum nuttallii
References
External links photo of herbarium specimen at Missouri Botanical Garden, collected in Oregon in 1881