Annual herb; stems many, up to 0.6 m. long from a slender unbranched root, ascending or prostrate, pubescent.. Leaf-blade ovate, oblong or elliptic, up to 5 cm. long and 1.1 cm. wide, obtuse or minutely apiculate at the apex, truncate or broadly cuneate and then narrowly cuneate at the base, glabrescent or with a few bristly hairs on the basal margins; petiole about 2 mm. long, ± winged.. Inflorescence a many-flowered, globose, subsessile head, 1–2 cm. in diameter, pilose with brown hairs when dry; bracts similar to sepals and leaves.. Sepals unequal, lanceolate, 5–7 mm. long and 0.5–1.5 mm. wide.. Corolla blue, 8–10 mm. long and about 10–12 mm. in diameter.. Capsule 2–3.5(–6) mm. in diameter, pale yellow.. Seeds yellow-brown, about 1.5 mm. long, papillate.
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