Herbs perennial, not drying black. Stems several together, to 50 cm, weak, repent, ± woody at base with age, internodes to 4--7 cm, with 2 lines of hairs. Leaves nearly all opposite; petiole to 3.5 cm, glabrous; leaf blade elliptic, 4--5 X 2.5--3 cm, abaxially glabrous, adaxially slightly pubescent, pinnatisect; segments 3--5 pairs, ovate to ovate-oblong, incised-double dentate. Pedicel slender, ca. 1.5 cm, glabrous. Calyx tube 6--7.5 mm, subglabrous, slightly cleft anteriorly; lobes 5, distinctly unequal, posterior one smallest. Corolla purple-red, 1.8--2.4 cm; tube erect, 0.8--1.4 cm; galea ca. 1 cm; beak bent upward, to 5 mm, slender; lower lip longer than galea, ca. 1.2 cm X 8 mm, middle lobe rounded. Filaments glabrous. Fl. Jul--Aug, fr. Aug--Sep.
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