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Prostrate ascending or erect annual to perennial herb, up to 25–40 cm tall or more; stems green to greyish green with a sparse to fairly dense indumentum of up to 3 mm long irregularly spreading hairs. Leaf-blades lanceolate to broadly ovate, up to 26–65 x 10–55 mm, sparsely pubescent with somewhat antrorse up to 2 mm long hairs along veins and margins, apex obtuse or acute, base shortly attenuate; petiole up to 4–15 mm. Flowers single at upper nodes on peduncles c. 1 mm long; bracteoles leaf-like, up to 10–15 x 4–11 mm with petiole up to c. 2–4 mm long. Calyx-lobes narrowly triangular-subulate, often with a prominent hyaline margin, densely pubescent with 0.3–1 mm long somewhat antrorse hairs, up to 6–15 x 1 mm at flowering, slightly enlarged in fruit. Corolla mauve to deep blue, up to c. 20–35 mm long; tube narrowly funnel-shaped, 13–22 mm long; lobes free from each other for up to 6–10 mm. Anthers c. 2.5 mm long. Capsule elongate and slender, c. 12–16-seeded, 16–22 mm long, finely pubescent with appressed 0.1–0.3 mm long hairs.