Tuyen Quang Prov., Na Hang Distr., Sinh Long Municipality, Khuoi Phin village, around point 22°38′21″N, 105°20′28″E.
Open secondary forest on rocky limestone slopes at elevation about 600 m a.s.l. along road. Tree 5 m tall on rather open places along road. Floral bracts pure with, flowers yellow. Very common.