FLORA OF VIETNAM
Acanthaceae

N. Vietnam, Hoa Binh prov., Da Bac distr., Cao Son municipality, Nui
Hen (Ba Tri) mountain system (20°54′09′'N, 105°12′15′'E). Remnants of
primary forest among secondary wet broad-leaved evergreen forest with
bamboo on very steep mountain slopes based on shale and sandstones
with quartzite at 900-1150 m a.s.l. Terrestrial and lithophyte herb up
to 0.5 m hg on very steep wet open slope and vertical cliffs. Flowers
white. Common.

HAL 590 4 April 2001

Collectors: N.T.Hiep, L.Averyanov, N.T.Vinh, D.T.Doan.