Quang Binh Prov., Minh Hoa Distr., Thuong Hoa municipality, around point 17°41’14.3”N 105°53’28.9”E. Primary closed evergreen broad-leaved shady forest in depression between remnant limestone mountains composed with solid highly eroded crystalline limestone at elevation about 650 m a.s.l. Tree about 8 m tall. Syconia light green. Occasional.