Herbs, annual, 20-70 cm tall, with small taproot. Stem suberect, weak, ridged, flexuous, leafy and branched throughout; accessory branches sometimes occuring above. Leaves glaucous abaxially, green adaxially, thin; petiole 3-7 cm, vaginate at base; uppermost leaves shortly stalked; blade triangular, 3-10 × 4-11 cm, triternate to sub-tripinnate; leaflets entire to deeply lobed; ultimate lobes obovate-obtuse to lanceolate-acute, mucronate. Racemes (5-)10-15(-20)-flowered, shortly stalked; bracts lanceolate to narrowly oblong, thin, entire or usually slightly dentate, apex often acuminate, upper ones 2-4 mm, lower ones to 1 cm. Pedicel ca. 2 mm, strongly reflexed in fruit. Sepals ca. 1 mm, finely and deeply dentate. Corolla cream, with greenish keels, very small; outer petals narrow, long acuminate at apex, with narrow obtuse entire crests overtopping apex; spur of upper petal straight, 5-6 mm, narrow; nectary ca. 4/5 as long as spur; lower petal slightly saccate to almost straight; inner petals 4-5 mm, not dark tipped. Stigma small, with broad irregular median sinus, 2-4 apical papillae, not sharply set off. Capsule obovoid, 5-8 × ca. 2 mm, 3-9-seeded; style sharply set off, ca. 2 mm. Seeds 1.2-1.3 mm, smooth, with small elaiosome. Fl. and fr. Sep.
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