An erect herb, annual, 8-25 cm high, simple or branched from the base, stem and branches rather stout, quadrangular, glandular-pilose. Leaves mainly at the base of stem, opposite, 1.2-2.5 cm long, 7-11 mm wide, variable, obovate to ovate, obtuse, entire, sparsely and shortly pilose, the lower petioled. Inflorescence a lax raceme, 4-20 cm long, few or many flowered. Bracts leafy, deflexed, up to 1.5 cm long and 1 cm wide, broadly ovate, obtuse, amplexicaul, glandular-pilose. Pedicels up to 1.3 cm long, wiry, terete, erecto-patent, pilose. Flowers large, up to 2 cm long. Calyx segments sub-equal, 3-5 mm long, linear, elliptic, obtuse, pilose. Corolla bilabiate, about 6 mm broad; upper lip 1.3 cm long, white with purple below and a yellow central spot; 4 upper lobes erect, oblong, unequal; lower lip 1.1 cm long, convex, broad, emarginate, yellow, bigibbous; gibbosities orange; palate glabrous, spur up to 1.3 cm long, deflexed, cylindrical, obtuse, pallid, the terminal third incurved. Capsule orbicular with apical notch, rounded at the base.
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Annual, up to 250 mm tall. Leaves ovate, entire, acute. Flowers in lax racemes, calyx lobes lanceolate, acute, glandular pilose, strongly reflexed, corolla 14-23 mm long; upper lip with narrowly linear or oblong lobes, white with purplish base; yellow patch with vertical purplish lines just above spur mouth, lower lip yellow with darker yellow palate, floor of corolla tube and palate glabrous, spur 9.5-12.3 mm, projecting back and downwards, tip strongly recurved. Capsule ovate, ± 7 x 5 mm.
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