Erect or decumbent perennial to 70 cm long; stem conspicuously ribbed, glabrous or glabrescent, papillate. Leaves sessile, oblong-elliptic, usually revolute but not so as to hide lower surface, entire or dentate, glabrous above, tomentose below; lamina 5-16 mm long, 2-5 mm wide. Flowers in cymo-panicles; inflorescence branches 1-3 together, 5-7-flowered, 11-17 mm long; pedicel 1-2 mm long; bracteoles linear-oblong, 3-4.5 mm long. Sepals covered by hairs, 0.2-0.5 mm long. Corolla 9-11 mm long; hairs outside type ia, ±short and dark grey, and longer and yellow-grey; wings 1.7-2.2 mm wide, smaller above auricle; calli 4-7 per row. Ovary c. 2.5 mm long; ovule erect. Fruit obovoid, to 4 mm long.
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