FLORA OF VIETNAM Plants of Sinh Long Commune Orchidaceae Dendrobium lagarum Seidenf.? Tuyen Quang Prov., Na Hang Distr., Sinh Long Commune, Khuoi Phin Vill., around point 22°38′19.8″N, 105°20′26.9″E, ca. 1100- 1200 m a.s.l. In closed primary evergreen broad-leaved mixed with conifers, lowland forests on ridge and top of limestone mts. Epiphyte herb, 60- 70 cm long, tepals white CPC 4544 28 Sept. 2011 (fix alcohol) P.V. The & N.T. Vinh, M.V. Tong