Erect undershrub to 120 cm tall, mostly glabrous. Leaves cauline, sessile, decurrent, linear to narrowly oblong, entire; lamina 3.5-6.0 cm long, 2-10 mm wide. Flowers in thyrses or racemes to 15 cm long; bracts linear, mostly c. 10 mm long; peduncle c. 10 mm long; bracteoles linear, 2.5-3.5 mm long; pedicel c. 3 mm long, not articulate. Sepals linear, c. 5 mm long. Corolla 12-15 mm long, almost glabrous inside, with enations, ±auriculate; abaxial lobes 5-7 mm long; wings 1.2-1.5 mm wide. Indusium oblong to obovate. Ovules c. 15. Fruit globular to ovoid, 4-5 mm long; valves bifid. Seeds orbicular, c. 1.8 mm diam., pale brown, reticulate-foveate.
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