Ascending, divaricate herb to 40 cm tall, viscid, with not appressed, simple hairs and coarse, glandular hairs; upper branches usually zig-zag. Basal leaves ephemeral, obovate to oblanceolate, with lamina to 3 cm long, 8 mm wide; cauline leaves linear, incurved, entire, with lamina 10-50 mm long. Flowers in racemes to 30 cm long, or subumbels; bracts leaf-like; peduncle 5-20 mm long; bracteoles linear, to 10 mm long; pedicel to 10 mm long, articulate. Sepals narrowly elliptic to lanceolate, 2-3.5 mm long. Corolla 7-10 mm long, villous basally inside, without enations, auriculate; abaxial lobes 2-3 mm long; wings c. 1 mm wide, narrower above auricle. Indusium obdeltoid, 1.5 mm long. Ovules 4-6. Fruit ovoid, 5 mm long, splitting to midmark; valves entire, recurving. Seeds elliptic, 4 mm long, aculeate, brownish; wing 0.1-0.2 mm wide, white.
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