Quang Binh Prov., Tuyen Hoa Distr., Lam Hoa municipality, Chuoi village, around point 17°56′51”N 105°49′18”E.
Secondary broadleaved evergreen closed forest in humid wet depression between remnant mountains composed with rocky highly eroded crystalline limestone at elev. about 100 m a.s.l.
Woody vine to 5 m long on open mossy rocks. Flowers yellow-orange, inflorescence bracts white. Common.