Locally known as Kaya-kayapuan. A crawling plant growing in shallow water fields and in mud, short and slender stalk, closely bounded, leaves; circinate vernation, modified, from light to deep green, leaflets 4 rarely 2 or 3, triangular, sessile, apically radiating in parallel, close to the rootstocks. Growing abundantly in waste lands, distributed through out the Philippines.
Ludwigia perrenis
Spreading herb to 1 m long, with stems armed with minute prickles. The leaves are compound, the pinnae usually 4 and digitately arranged at the end of the petiole. The leaflets are narrowly oblong and inequilateral, to 1.5 cm long. The flower heads are 1cm in diameter, with minute pinkish flowers. Fruits are flat to 2 cm long. A pantropic weed. Introduced to the Philippines by America.
Lygodium japonicum
Locally known as nitong-nitong; commonly known as Japaneseclimbing fern. A slender, twining, deciduous member of the fern family, up to 3 meters in length, glaborous, rachis; narrowly winged, pinnate, fronds; bright green, divided into numerous long leafltes varies from circular to narrow and sometimes lobed basally, pinnules up to 5 on each side. Ferns require moist to survive, propagated through division. Widely distributed in east and southeast Asia.