Quang Nam Prov., Phuoc Son Distr., Phuoc My Municipality around point 15°20′25”N 107°40′27”E.
Primary closed evergreen broad-leaved lowland wet forest on steep slopes of low mountains composed with shale and granite at elevation 500-600 m a.s.l.
Terrestrial herb on shady slopes along wet humid shady rocky stream canyon. Flowers dirty gray-brownish with whitish marks. Locally common.
HAL 11967 6 January 2009 Coll.: L.Averyanov, P.K.Loc, P.V.The, N.T.Vinh