Polygonum nuttallii
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.Polygonum nuttallii is an herb up to 35 cm (14 in) tall. Stems are thin and wiry. Flowers are white or pink.
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.Polygonum nuttallii is an herb up to 35 cm (14 in) tall. Stems are thin and wiry. Flowers are white or pink.

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photo of herbarium specimen at Missouri Botanical Garden, collected in Oregon in 1881