Polygonum douglasii March 2, 2020December 24, 2019 by rcarr Scientific NamePolygonum douglasii GreeneFamilyPolygonaceaeCommon NamesDouglas’ knotweed, Douglas’s knotweedEastern WashingtonNativeConservation StatusNotes Click on any image to enlarge it. Along Hwy 129 0.38 mi S of Field Springs State Pk; 46.08782N 117.17684W; Asotin Co., WA; 7/25/2012Along Hwy 129 0.38 mi S of Field Springs State Pk; 46.08782N 117.17684W; Asotin Co., WA; 7/25/2012Along Hwy 129 0.38 mi S of Field Springs State Pk; 46.08782N 117.17684W; Asotin Co., WA; 7/25/2012Along Hwy 129 0.38 mi S of Field Springs State Pk; 46.08782N 117.17684W; Asotin Co., WA; 7/25/2012Along Hwy 129 0.38 mi S of Field Springs State Pk; 46.08782N 117.17684W; Asotin Co., WA; 7/25/2012Along Hwy 129 0.38 mi S of Field Springs State Pk; 46.08782N 117.17684W; Asotin Co., WA; 7/25/2012Along Hwy 129 0.38 mi S of Field Springs State Pk; 46.08782N 117.17684W; Asotin Co., WA; 7/25/2012North edge of Mcdowell Lake; ca. 10.5 air mi. SE of Colville, WA; N 48.46953 W 117.68309; Stevens Co.; 8/25/2012North edge of Mcdowell Lake; ca. 10.5 air mi. SE of Colville, WA; N 48.46953 W 117.68309; Stevens Co.; 8/25/2012North edge of Mcdowell Lake; ca. 10.5 air mi. SE of Colville, WA; N 48.46953 W 117.68309; Stevens Co.; 8/25/2012North edge of Mcdowell Lake; ca. 10.5 air mi. SE of Colville, WA; N 48.46953 W 117.68309; Stevens Co.; 8/25/2012North edge of Mcdowell Lake; ca. 10.5 air mi. SE of Colville, WA; N 48.46953 W 117.68309; Stevens Co.; 8/25/2012North edge of Mcdowell Lake; ca. 10.5 air mi. SE of Colville, WA; N 48.46953 W 117.68309; Stevens Co.; 8/25/2012North edge of Mcdowell Lake; ca. 10.5 air mi. SE of Colville, WA; N 48.46953 W 117.68309; Stevens Co.; 8/25/2012North edge of Mcdowell Lake; ca. 10.5 air mi. SE of Colville, WA; N 48.46953 W 117.68309; Stevens Co.; 8/25/2012