Perennial or annual,
erect to creeping herbs, fleshy-succulent, terrestrial. Leaves few, alternate,
petiolate, exstipulate, blade puberulent, base oblique, cuneate to cordate.
Inflorescences racemose, lax and later appearing scorpioid, pseudoterminal or
axillary; bract 1, opposite each flower. Calyx 5-lobed, segments equal, tube campanulate or semitranslucent.
Corolla white, blue to purple, tube cylindric, 1.5-4.0 mm diameter, 2-lipped,
adaxial lip 2-lobed, abaxial lip 3-lobed, seldom undivided, apex rounded.
Stamens 2 or 4, filament adnate to corolla tube near middle. Ovary ovoid,
1-loculed; stigma 1, undivided. Fruit
a capsule, straight, globose or ovoid, dehiscing loculicidally to base, valves
2, straight, not twisted, enclosed with calyx remnant. Seeds minute, cuneate,