Excoecaria is a plant genus of the family Euphorbiaceae, formally described by Linnaeus in 1759. The genus is native to the Old World Tropics (Africa, southern Asia, northern Australia, and assorted oceanic islands).The milky latex of Excoecaria agallocha, also known as Thillai, milky mangrove, blind-your-eye mangrove and river poison tree, is poisonous. Mangroves of this plant surround the ancient Thillai Chidambaram Temple in Tamil Nadu. Contact with skin can cause irritation and rapid blistering; ...