FLORA OF VIETNAM
Rubiaceae
Ophyorhiza sp.

Lai Chau Prov., Sin Ho Distr., Ma Quai Municipality, Tua Vang mountain ridge, around point 22°24′01″N 103°22′22″E.

Broad-leaved evergreen closed wet primary forest on steep mountain slopes composed with sandstone at elev. 1500-1650 m a.s.l.

Lithophytic herb on mossy cliffs on very steep rocky slope near top of ridge. Flower buds white. Locally common.

HAL 9961 18 Nov. 2006
Coll.: Nguyen Tien Hiep, L.Averyanov, Pham Van The.