Annual. Stems several from the base, up to 2 m. long, prostrate, with soft patent hairs when young. Leaf lamina ovate-cordate, 1–4 × 0·75–3 cm., more or less distinctly crenate or crenate-dentate, acute to rounded at the apex, sparsely pilose on both surfaces, pellucidly glandular when dry; basal sinus usually wide and shallow with the blade cuneately decurrent into the slender up to 2 cm. long pilose petiole. Flowers solitary or in few-flowered fascicles; pedicels slender, pilose, up to 15 mm. long; bracteoles subcordate at the base, acute, ciliate or midrib and margin, up to 3 mm. long. Sepals unequal, up to 10 mm. long, green often suffused with purplish red, pilose, the outer three ovate from a cordate base, obtuse or subacute, the two inner lanceolate, acute, all accrescent, becoming papyraceous with distinct finely raised veins, attaining 13 × 9 mm. Corolla funnel-shaped, white or mauve, 10–13 mm. long; midpetaline areas slightly hairy. Ovary hairy. Capsule subglobose, densely pilose. Seeds black, hairy.
