Quang Binh Prov., Minh Hoa Distr., Thuong Hoa municipality, around point 17°43′31.6”N 105°53′38.0”E.
Primary closed evergreen broad-leaved humid forest on leveled flat terrace of stream valley composed with solid highly eroded crystalline limestone at elevation about 458 m a.s.l.
Terrestrial herb to 1.2 m tall. Leaves below violet. Floral bracts purple. Not rare.