Quang Tri Prov., Da Krong Distr., Ta Rut municipality, A Pul village, around point 16°24′29”N 107°01′07”E.
Highly destroyed primary and secondary broadleaved evergreen open forest along rocky river canyon composed with shale and sandstone at elev. about 300 m a.s.l.
Terrestrial herb to 2 m tall in wet place along shady rocky river valley. Floral bracts purple. Flowers white. Common.