Herbs annual, to 50 cm tall, mostly branched; branches slender, opposite basally, in whorls of 3 apically. Leaf blade oblong-lanceolate, glabrous, pinnatisect; segments pinnatifid, margin double dentate. Flowers opposite or in whorls of 3, interrupted; bracts leaflike. Calyx ca. 3 mm, rounded, membranous; lobes 5, unequal. Corolla purple; tube ca. 6 mm; galea ± falcate, crested; beak bent downward, slightly bowed, ca. 4 mm; lower lip ca. 6 X 8 mm, middle lobe smaller than lateral lobes, ligulate, apex hoodlike. Filaments glabrous. Capsule enclosed by accrescent calyx, compressed, ovoid, ca. 9 X 6.5 mm, apex acuminate. Seeds ca. 2.2 mm. Fl. Aug.
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