FLORA OF VIETNAM Acanthaceae Pseuderanthemum cf. latifolium (Vahl) B.Hansen Det.: Yun-Fei, Deng 2008
N. Vietnam, Prov. Quang Binh, distr. Minh Hoa, 72 km to NWW from Dong Hoi, municipalite Thong Hoa, vicinities of Yen Son village, limestone massif Ke Bang (N 17°40′ E 105°57′). Primary evergreen closed broadleaved forest on steep slopes and bluffs of limestone mesas at 450-550 m alt. Terrestrial and epilitic herb up to 1.5 m hg on steep shadow slopes. Flowers brightly purple-lilac. Common at 300-500 m alt. VH 4651 16.05.1997 International Botanical Expedition of the U.S.A. National Geographic Society (grant No 5803-96)