Invasive Ipomea spp. Invasive grass introduced by Japanese. The later forms impenetrable thorn thickets. A member of Ficus. Not invasive on Pohnpei.
Birds spread the seeds.
Very aggressive tree. All over the island now. Destroy all plants as soon as it appears it might be aggressive. Wedelia trilobata came to the island as a single plant - how easy it would have been to wipe it out back then. Now it is beyond control.