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Small shrub or perennial herb up to 10–45 cm tall; young stems pale green, densely pubescent with patent up to 0.7 mm long glandular and eglandular hairs; old stems pale grey. Leaf-blades linear to narrowly lanceolate or rarely narrowly ovate, up to 35–90 x 3–9 mm, with prominent pale veins, densely ciliate-pubescent with up to 1.5 mm patent white hairs and thin glandular hairs, apex acute, base attenuate; petiole indistinct. Flowers single in leaf axils, subsessile; bracteoles leaf-like, up to 17–22 x 2 mm. Calyx-lobes with pale midvein and broad hyaline margins, narrowly triangular-subulate, up to 5–12 x 1 mm, enlarged in fruit, fairly densely hairy with up to 0.8 mm long somewhat antrorse hairs especially along midvein and margin. Corolla blue or white, at least up to c. 15–28 mm long and 10–12 mm across; tube funnel-shaped, up to 10–12 mm long; lobes with free part 5–6 mm long. Anthers c. 1.5 mm long. Capsule elongate and slender, 8–16-seeded, up to 12–16 x 2–3 mm, fairly densely pubescent with c. 0.2 mm long appressed simple hairs all over.