Brillantaisia

Erect to prostrate herbs to erect, sturdy shrubs; stems square, glabrous to densely pubescent; cystoliths longitudinal, narrowing towards one end. Leaves broadly ovate to ovate, occasionally elliptic or linear-lanceolate; base cordate to cuneate; margin entire to regularly toothed; glabrous to pubescent; petiolate, lamina decurrent in top half of usually winged petiole. Inflorescence a terminal or lateral thyrse; bracts foliaceous; bracteoles linear to obovate. Calyx with 5 equal or unequal, linear to spathulate sepals. Corolla 2-lipped, purple to blue, occasionally white; tube cylindric with 2 brown-yellow markings in throat; upper lip hooded, 2-lobed; lower lip broad, reflexed at edges, 3-lobed, 2 lateral membranous pouches at base of lower lip forming a hinge with apex of tube. Androecium with 2 posterior stamens fertile; filaments white, flattened; anthers sagittate, dorsifixed; 2 anterior ones reduced to slender staminodes, often with vestigial anther, occasionally minute or absent. Gynoecium : style slender, not exserted; stigma a single flattened lobe; second lower lobe reduced to a minute tooth; ovules many. Capsule linear, pointed, with deep longitudinal grooves down centre of the 2 valves. Seeds rounded to slightly kidney-shaped, flattened, borne on retinacula, covered with adpressed hygroscopic hairs.