Subshrubs, 1-1.5 m high; stem jointed, pubescent. Leaves
opposite, 4-14 x 2-5 cm, broadly elliptic, attenuate, acuminate, entire
or wavy, glabrous, dark green; lateral nerves 2-5 pairs; petioles 0.5-3
cm long. Inflorescence terminal or axillary, dense panicle of spikes;
peduncles 3-9 cm long, glandular, pubescent; bracts linear-lanceolate,
acuminate, 1-2 cm long, 2-4 mm wide, hirsute; bracteoles
linear-lanceolate, 4-6 x ca 1 mm. Calyx-lobes 5, shortly connate,
filamentous, 4-8 mm long, glandular hairy. Corolla blue; tube narrow,
2-2.5 cm long, pubescent; limb subequally 5-lobed, twisted to the left
in bud, ovate, 1-1.5 cm across. Stamens 2, attached at the throat of the
tube; filaments 2-5 mm long; anther-thecae oblong; 2-3 mm long; ovary
oblong, 2-4 mm across; style 2-3 cm long; stigma dilated. Capsules
oblong, 1.5-2.5 cm long, 4-6 mm wide; seeds 4, compressed, 2-3 mm thick,
hygroscopically hairy.
Habitat: Semi-evergreen and moist deciduous forests and sacred groves