Synedrella nodiflora
The erect herb in the centre of is Synedrella nodiflora (sometimes known as Cinderella weed). There is also some Mikania micrantha in this picture. Those weeds are reported as weeds in taro plantations from Samoa.
Photo by A. Macanawai courtesy Ecoport
(source URL: http://www.ecoport.org)
