Achenes tuberculate, 4-5 mm long, few achenes maturing in cultivated plants in Hawai'i. Forms a dense ground cover, crowding out or preventing regeneration of other species. Cultivated as an ornamental. Seed, although more common vegetatively.
Stems form new plants where they touch the ground and pieces readily take root.
Becoming established on Niue, May 2000. This gives good control, but it is important to follow-up with touch up treatments to pick up the underground stems which were missed first time round. Wedelia trilobata on Pohnpei. Thaman, R. R. 1999. 26 September-1 October, 1999.