Dendrobium metrium Kraenzl., 1910, Pflanzenr. 45 : 221; Ormerod, 2001, Oasis, Suppl. 2: 9. - D. modestum Ridl., 1898, J. Bot. 36: 211, non Rchb.f., 1855. - D. sociale J.J.Smith, 1912, Bull. Jard. Bot. Buitenz. s. 2, 3: 61. - D. nhatrangense Gagnep., 1930, Bull. Mus. Nat. Hist. Nat., 2 s., 2, 2: 237. - D. alleizettei Gagnep., 1950, Bull. Mus. Nat. Hist. Nat., 2 s., 21, 6: 740. Described from Malaya ("Penang Hill"). Type ("Ridley 7238″) - SING (holo). Distrib.: Thailand, Vietnam, Malaya, Sumatra. (all fide Ormerod, 2001, l.c.).
Vietnam., Lam Dong prov., Bi Doup ? Nui Ba, near headquorter, on the road to the direction of Nha Trang, in primary rocky forest. Flowers light pink to almost white, lip with purple nerves. Plant sent to prof. Phan Ke Loc by collectors.
12 April 2015 AL 83 living plants. Coll.: Nguyen Van Nam and Nguyen Van Manh no 1.