FLORA OF VIETNAM Orchidaceae Spiranthes sinensis (Pers.) Ames
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. Bracts dull green, tepals white at base, pink on lobes and at tip. Widespread and common.