Yen Bai Prov., Mu Cang Chai Distr., Nam Co municipality, from Nam Co to Phinh Ngai village, around point 21°53′57.1″N, 104°18′06.9″E, 1720 m a.s.l.
Secondary evergreen broad-leaved woodland and scrub on the soil mountain at elevation about 1000- 1500 m a.s.l. Herb 1 m tall, petals violet, white latex, very common CPC 4448 21 September 2011/ Hiep’s photo Coll.: N.T.Hiep, N.S. Khang. P.V. The. N.T. Vinh & H.V. Than Sponsored by Charity Number 1011102 through FFI with Project Title: Conservation of Taiwania cryptomeriodes Hayata through in-situ protection and promotion as a national reforestation species