There are rarities including tubular water dropwort "(Oenanthe fistulosa)". The wetter areas which are sometimes flooded include hemlock water dropwort, and yellow flag. Native food plants include the water dropwort ("Oenanthe javanica") and wasabi ("Wasabia japonica"). The river supports a range of plant species including dropwort, pondweed, club-rush, water-cress and "Ranunculus". Water dropwort is characterized by a yellow liquid that changes color due to air exposure.