asian knotweed donkey rhubarb invasive species in bloom

asian autumn background bamboo biology bloom blossom bush curse donkey ears elephant fallopia fleece fleeceflower floral flower foliage fungus green hancock herbaceous himalayan huzhang invasive itadori japanese japonica knotweed leaves medicinal monkey monkeyweed natural nature organic pea perennial pest plant polygonaceae rhubarb sakhalin sally season shooters species vegetable vine weed wild