Sesuvium portulacastrum

Sesuvium portulacastrum is a sprawling perennial herb in the family Aizoaceae that grows in coastal and mangrove areas throughout much of the world. It grows in sandy clay, coastal limestone and sandstone, tidal flats and salt marshes, throughout much of the world. It is native to Africa, Asia, Australia, Hawai`i, North America and South America, and has naturalised in many places where it is not indigenous. It is commonly known as shoreline purslane or (ambiguously) "sea purslane," in English, dampalit in Tagalog and 海马齿 hǎimǎchǐ in Chinese....read more on Wikipedia.