An ascending undershrub, perennial, slender, branched; branches tetragonous, glabrous; internodes mostly longer than the leaves; leaves opposite, lanceolate or lanceolate-elliptic, acute at the apex, wedge-shaped or nearly rounded at the base, sharply few-toothed, glabrous on both faces, erect-patent, shortly petiolate or sessile, 1/3-3/4 in. long, 1/8-1/4 in. broad; racemes lax, several-flowered; rhachis glandular-puberulous; pedicels erect-patent, filiform, glandular-puberulous or pilose, 1/4-2/5 in. long; bracts minute, patent or spreading, viscid-puberulous; calyx-segments linear or lanceolate-linear, subacute, densely glandular-puberulous, subdivaricate, 1/12-1/10 in. long; corolla glabrous; lobes of the upper lip white, subequal, erect, rounded, 1/10-1/6 in. long; lower lip white, rounded-oblong, shortly excised at the apex, about as long as the upper; throat inflated, puberulous, dilated at the base into a very obtuse pale violet pouch; pouch or spur minute, nipple-like, scarcely 1/25 in. long; capsule oblong, excised at the apex, rounded at the base, glabrous, erect-patent, 1/4 in. long, 1/5 in-broad; valves shortly horned; seeds pale brown, 1/12 in. broad, body oblong and densely verrucose, the winged part twice the length of the body.
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Short-lived, sprawling perennial to 30 cm. Leaves opposite, lanceolate to ovate, toothed, 3-5-veined from base. Flowers in lax racemes, upper lip white with bluish grey lines and lilac reverse, lower lip white with a raised, greenish-yellow palate, palate glabrous, lower corolla tube with raised, medial ridge, spurs ± 2 mm long, capsules as long as wide or sometimes longer than wide.
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