Yen Bai Province, Van Yen District, Na Hau commune, primary evergreen broad-leaved forest, at elevation 400-600 m a.s.l., occasionally along streams on stream valley slopes in wet places with soil ricj in humus, around 21 45 28N 104 34 26E, rare, 18 March 2024, Nguyen Huu Cuong, Nguyen Van Ly, Ly240317015.