Hibiscus tiliaceus, commonly known as the sea hibiscus or coast cottonwood, is a species of flowering tree in the mallow family, Malvaceae, with a pantropical distribution along coastlines. It has also been introduced to Florida and New Zealand. It has been debated whether this species is native or introduced to Hawaii. Common names include sea hibiscus, beach hibiscus, coastal (or coast) hibiscus, coastal (or coast) cottonwood, green cottonwood, native hibiscus, native rosella, cottonwood hibiscus, kurrajong, sea rosemallow and dhigga (Maldivian). The plant was introduced by Austronesian peoples that voyaged across Southeast Asia and Oceania as a source of wood and fibre. This is reflected in the names of the plant as spoken in many related languages spoken in those regions including balibago (Tagalog), malobago (Bikol), malabago or malbago (Cebuano – Southern), maribago (Cebuano – Northern), lambago (Cebuano - Cagayan de Oro), waru (Javanese), varo (Malagasy), baru or bebaru (Malay), pagu (Chamorro), hau (Hawaiian), fau (Samoan), purau (Tahitian), and vau tree (Vietnamese). The specific epithet, "tiliaceus", refers to its resemblance of the leaves to those of the related Tilia species. Hibiscus tiliaceus has a worldwide tropical distribution. In the Old World and Oceania, it is a common coastal plant in most of tropical Africa, South Asia (including the Maldives), Southeast Asia, parts of East Asia (as far north as central Japan, where it reaches its northernmost extent), eastern and northern Australia, and much of the Pacific Islands, including Hawaii (where its establishment status is uncertain). It has also been introduced to New Zealand. A separate variety, var. pernambucensis (formerly considered a separate species, H. pernambucensis), is native to the tropical New World, including Mexico, Central America, the Caribbean, and much of South America. This variety has also been introduced to Florida. It is uncertain if the species is native to Hawaii, as it may have been introduced by the Polynesians.