Rubiaceae

Ophiorrhiza sp.

Hanoi Capital Region, Ba Vi National Park, humid mossy primary and secondary evergreen broad-leaved forest on steep mountain slopes composed by solid shale at elevation of 1100-1300 m a.s.l. along trail to peak of 1296 m. Terrestrial herb to 25 cm tall on open mossy place along forest trail. Not common.

11 May 2025, Cuong Huu Nguyen, Son Van Le, Ha Van Dang, Ly Van Nguyen, L. Averyanov, T. Maisak, AL4282 (NHC084).