Taxa: Polygonum douglasii, Polygonum douglasii ssp. douglasii (Polygonum buxiforme var. montanum, Polygonum douglasii var. latifolium, Polygonum emaciatum, Polygonum montanum), Polygonum douglasii ssp. austiniae, Polygonum douglasii ssp. engelmannii, Polygonum douglasii ssp. majus, Polygonum douglasii ssp
... (show all). nuttallii, Polygonum douglasii var. austiniae, Polygonum douglasii var. microspermum, Polygonum douglasii var. montanum, Polygonum douglasii var. utahense