Herbaceous, erect or procumbent, sometimes climbing on bushes; stem much branched, obtusely quadrangular. Leaves 2.5–6.0 x 2–4 cm, ovate elliptic, base usually rounded or subcordate, rarely acute, apex acute, dark green. Capsules 2.5–3.0 cm long with solid base, clavate, pointed, pubescent, usually constricted about the middle of the enlarged part. Seeds 4, c 0.5 cm across, tuberculate.

Flowering and Fruiting: November–April.