An erect herb, annual, glabrous below, puberulous above, shining, simple or sparingly branched at the base, about 6 in. high; stem and branches quadrangular; upper internodes much exceeding the leaves, the basal short; leaves opposite, oval or lanceolate or the upper sublinear, obtuse or rounded at the apex, narrowed to the sessile or subsessile base, toothed or subentire, 1/5-1/2 in. long, 1/20-1/6 in. broad; racemes subcorymbose, few-flowered, 1/2-3/4 in. long; bracts alternate, broadly linear, obtuse, 1/10-1/8 in. long, puberulous; pedicels in the axils of the bracts, the lower at length ranging up to 5/8 in. long; calyx-segments narrowly oval, rounded at the apex, slightly glandular-puberulous, about 1/10 in. long in flower and 1/6 in. long in fruit; upper corolla-lobes broadly obovate-oblong, rounded at the apex, about 1/4 in. long and 1/6 in. broad; lower lip subrotund, nearly 1/3 in. long, 3/8 in. broad; palate bearded; spur nearly 1/2 in. long, conical-prolonged, nearly straight, narrowed at the apex, obtuse; capsule (not quite mature) 1/5 in. long and broad, broad and emarginate at the apex, with short spreading points at the sides near the top, unequally rounded at the base.
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Annual, up to 300 mm tall. Leaves elliptic-lanceolate, slightly toothed. Flowers in lax racemes, calyx lobes ovate, glandular pubescent, corolla up to 26 mm long, upper lip white or pale yellow, lower lip yellow to orange-yellow, palate with 2 orange glabrous bosses, spur ± 12 mm long, projecting downwards or deflected forward, ± straight, acute, exceeding lower lip, glandular pubescent. Capsule broadly ovate, ± 9 x 8 mm, glandular pubescent.
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