Extension: Species of Southeast Asia, ranging from South China’s Yunnan province north through Vietnam and Malaysia to Indonesian Sumatra and Java in the south. Parts of literature are also reported from northern India and Nepal.
Ecology: Grows in damp mountain forest forests and in bushes, damp ravines and mountain meadows, rises up to an altitude of about 4000 m. Flowering often all year round.
Description: Perennial herb with deciduous stem, ascending to straight, up to 200 cm long, mostly branched, rounded, lysed or rarely sparsely hairy. The leaves are alternate, petiolate, elliptic, lanceolate to ovate, 3.5-13 cm long and 1.2-4.6 cm wide, wedge-shaped or rounded, edge-to-serrate, serrate, glabrous, rarely oily . The flowers grow individually in the leaflets, their stems are up to 5.5 cm long, glabrous; the calyx is bell-shaped, glabrous, the calyps are linear, 2-14 mm long, protruding, somewhat curved, all-round; the crown is bluish to dark purple, the lip is lighter or striated, with a white drawing, 15-26 mm long, outside glabrous, inside hirsute, dorsal lobes are linear, ventral elliptic, pointed; the pole post is glabrous, up to 2.5 times longer than anthers. The fruit is a spherical berry, 6-15 mm long, mature purple to almost black.