Thanh Hoa Prov., Thuong Xuan Distr., Bat Mot Municipality, Duc village, Xuan Lien Natural Reserve. Primary broad-leaved evergreen forest on rocky limestone at elevation 800-1000 m a.s.l. around point 20°01’11.6’’N 104°57’47.5’’E. Tree 6-8 m tall on shady very steep rocky slope. Syconia orange to red. Not common.