UCI Freshwater Marsh, 8-16-12. © Ron Vanderhoff

Longroot Smartweed
(Water Knotweed, Water Smartweed, Amphibious Bistort)

Persicaria amphibia
(=Polygonum amphibium)

Native to California

Back to Polygonaceae of Orange County, California
Back to Plants of Orange County, California
Back to Natural History of Orange County, California

UCI Freshwater Marsh, 8-16-12. © Ron Vanderhoff
Barbara's Lake, Laguna Cyn., 9-11-11. © Ron Vanderhoff

Barbara's Lake, Laguna Cyn., 9-11-11. © Ron Vanderhoff

Barbara's Lake, Laguna Cyn., 9-11-11. © Ron Vanderhoff