Erect to prostrate perennial to 60 cm long; stem conspicuously ribbed, tomentose, glabrescent. Leaves sessile, usually fasciculate in axils, linear to linear-oblong, usually so revolute as to hide lower surface, entire, thick, glabrous and glossy above, tomentose below; lamina 9-26 mm long, 2-5 mm wide. Flowers in cymo-panicles or clusters; inflorescence branches usually single, 3-11 mm long, mostly 1-flowered, usually tomentose; pedicel 3-5 mm long; bracteoles linear-elliptic, 1-2 mm long. Sepals tomentose 1-1.5 mm long. Corolla 10-14 mm long; hairs outside type i, short, grey to black, and type ii, longer, paler; wings 1.7-3.2 mm wide, almost equal; calli 2-9 per row. Ovary 2-3 mm long; ovule erect. Fruit obovoid, to 4 mm long.
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