Alpine knotweed, Polygonium phytolaccaefolium. They would pound the root and put it on a swelling to draw out the poison. paˀaníx̣ana płɨ́x̣ tamax̣płáki amaš kʷná tɨ́tsana ‘they used to make a medicine with alpine knotweed (for) where you were having a swelling’.
Language Program · Confederated Tribes of the Umatilla Indian Reservation