FLORA OF VIETNAM Orchidaceae Tainia angustifolia (Lindl.) Benth. & Hook.f.
N. Viet Nam. Ha Giang Province, Quang Ba District, at Sin Suoi Ho village and river. Degraded agricultural land among limestone rocks to ridgetop of exposed limestone under light canopy with many epiphytes and lithophytes on north and east facing slopes, at 23°06′57″N, 105°01′48″E, at 514-900 m. Lithophytic. Inflorescence scape dull red-purple, pedicel deep purple, tepals dull red-brown, rostellum yellow, bright yellow on lip, light purple on tip. Rare.