Son La Prov., Yan Chau Distr., Yen Son Municipality, Co Chia village.
Secondary woodland among agricultural lands on hills composed by crystalline limestone at elevation about 800 m a.s.l. around point 21°00′42.1″N 104°14′05.5″E.
Undershrub to 1.5 m tall on secondary open shrubs along road. Occasional.