An annual creeping herb, up to 40 cm long, branches ascending at the ends, stem with air cavities. Leaves oblong-obovate, 9-B45 mm long, base attenuate, margins shallowly remotely dentate, minutely bristly. Flowers axillary, solitary, 2 per leaf pair, pedicel up to 1 cm long, corolla tube 5B-8 mm long, widening upwards, upper lip subemarginate, margins recurved, lower lip 3-lobed, middle lobe hairy inside, corolla base yellow, lobes pale blue-purple to white, stamens 2, lilac, staminodes 2, erect, apex club-shaped, bright yellow. Capsule erect-patent, linear-lanceolate, 1B-1.8 cm long, twice as long as the calyx. Seed ellipsoid, reticulate, base acute, apex obtuse or narrowed.

Acts as an anthelmintic (decoction of roots and leaves); emmenagogue (whole plant)

PROSEA (Plant Resources of South-East Asia) Foundation

Used to cure diarrhea (roots); as part of a medicine for vertigo (plant).