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 rosulate herb on shady vertical cliff on shady mossy rocky steep slope near top of ridge. Flower buds white. Occasional.

HAL 9977 18 Nov. 2006
Coll.: Nguyen Tien Hiep, L.Averyanov, Pham Van The.