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Leaves sub-sessile to shortly petiolate, 1.2–3.5(6.0) x 0.6–1.8(3.5) cm., ovate, acute apex, base rounded to broadly, unequally cuneate, serrate, glavrous or sparsely furnished with short, flexuous white hairs; petiole 0.5–3(6) mm. long.
Corolla white to pale mauve with purple striations; upper lip 4–5 mm. long, lower lip 5 mm. long, emarginate; spur 2–3(4.5) mm. long.
Calyx 2.2–4(4.5) mm. long, lobes 0.5–1.2 mm. wide linear or linear-oblong, subobtuse, sparsely glandular-pubescent, ciliate.
Pedicels 4–9 mm. long, to 15(25) mm. in fruit, minutely pubescent or glandular-pubescent to subglabrous.
Stem and branches quadrangular, sparsely pubescent or glandular-pubescent to glabrous.
Capsule cylindrical, 5–12.5 x 3–7.3 mm., shallowly emarginate, base truncate.
Erect annual or biennial herb to 65 cm. tall, branched from base.
Racemes up to c 12 cm. long in fruit.
Bracts small, leaf-like.
