Erect undershrub to 30 cm tall, sparsely branched from erect stock, with brownish, cottony hairs, glabrescent. Leaves cauline, linear, narrowing basally, recurved, entire; lamina 3-50 mm long, 1.5-2.0 mm wide. Flowers in racemes to 15 cm long; bracts leaf-like; peduncle 1-5 mm long; bracteoles linear, c. 1 mm long; pedicel 1-2 mm long, pedicels articulate. Sepals linear to oblanceolate, 4-5 mm long. Corolla c. 9 mm long, villous inside, with enations, auriculate; abaxial lobes 3-5 mm long; wings c. 0.5 mm wide. Indusium depressed-obovate. Ovules 4-10. Fruit ovoid, c. 8 mm long; valves entire. Seeds elliptic-oblong, c. 3 mm long, yellow-brown, aculeate.
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