FLORA OF VIETNAM
Orchidaceae
Rhomboda khangii Aver., sp.nov. paratype

Border area between Phieng Luong municipality (Ha Giang Prov., Bac Me Distr.) and Sinh Long municipalitiy (Tuen Quang Prov., Na Hang Distr.). Primary broad-leaved humid evergreen and mixed forest on very steep slopes and along rocky ridge composed with solid crystalline highly eroded limestone at elevation 1100-1170 m a.s.l. around point 22°38′24.3″N 105°20′21.3″E. Creeping terrestrial herb. Leaves velvety dark olive-brown to almost black with white median stripe. Occasional.
14 November 2014 CPC 7431b / TM 1143 Living plant only.
Coll.: L.Averyanov, N.T.Hiep, N.S.Khang, T.Maisak, L.Osinovetz
Flowered in cult. in August 2016; sepals reddish-brown; petals hyaline greenish, brownish to apical part; hypochile and spur reddish-brown, epichile white; column reddish-brown, anther cap pale dull yellowish.