FLORA OF VIETNAM Hypericaceae Hypericum hookerianum Wight & Arn.
Son La Prov., Moc Chau Distr., Chieng Son comm., Pha Luong village, Pha Luong Mountain (elevation from Pha Luong village at 930 m to Mt. peak at 1860 m a.s.l.).
Open secondary scrub after fire on flat sandy Pha Luong summit composed with eroded red-brown sandstone at elevation 1800-1850 m a.s.l. around point 20°40′23.0N 104°37′52.0E.
Undershrub 1-1.5 m tall in open rocky places. Flowers yellow. Occasional.