Rubiaceae

Ophiorrhiza sp.

Thanh Hoa Province, Quan Hoa District, Nam Dong Community, Ban Lo Village, Ke Stream, the territory of Nam Dong National Reserve around point 22º25’46’’N 105º36’58’E. Old secondary broad-leaved evergreen humid forest on wet very steep alluvial slopes based on solid, marble-like highly eroded limestone at elevation of 600–800 m a.s.l. Terrestrial and lithophytic herb 0.7–0.8 m tall along rocky stream. Leaves above dark green, below dull purple or pale green. Flowers white. Not common.

04 May 2024, Nguyen Huu Cuong, Nguyen Van Ly, L. Averyanov, T. Maisak, AL2987.