Quang Binh Prov., Tuyen Hoa Distr., Lam Hoa municipality, Hung village, around point 17°55’41”N 105°49’43”E.Highly degraded primary and secondary evergreen broadleaved forest on very steep rocky slopes of remnant limestone hills composed with highly eroded marble-like crystalline limestone at elev. 200-300 m a.s.l. Treelet 4-6 m tall along rocky ridge. Syconia green. Occasional.