The Aeschynanthus genus occurs widely in tropic or subtropic Asia, and comprises about 140 species. They are evergreen perennial herb, and epiphytes that usually grow on the tree trunks or rocks in the wild. They have also relatively tolerant of drought. The speciosus is one of most common species in gardens. Its leaves are thick and glossy, and the large, red-orange, tublar flowers bloom at the terminal stems.