Pinkhead Smartweed / Pink Knotweed / Polygonum capitatum. Desolation Trail, Hawaii Volcanoes NP, Big Island, Hawaii, USA.
Pinkhead Smartweed / Pink Knotweed / Polygonum capitatum, on Desolation Trail, in Hawaii Volcanoes National Park, Big Island, Hawaii, USA. Polygonum capitatum (synonym: Persicaria capitata; or Pinkhead Knotweed) is native to western China and the Himalayas. It was introduced to Hawaii as an ornamental groundcover but became naturalized in the wild. On the Big Island, these weedy plants grow along roadsides and in open lava fields at middle elevations.Add to Cart Add to Lightbox Download