Small herb, with a glabrous, up to 12 mm long stem. Leaves alternate, 1.5-2.5 cm long; limb ovate or ovate-elliptic, 7-12 by 5-7 mm, rounded or broadly cuneate at base, wavy along margins and with distinct, pear-shaped glands, obtuse or rounded at apex, coriaceous when alive, glabrous on either side, pilose along margin; petiole up to 11 mm, pilose in apical part only. Flowers chocolate-coloured, axillary and terminal; pedicels up to 6 mm, glabrous. Calyx 2.5-3 mm long; lobes lanceolate-linear, 1-1.5 mm long, usually with 3 glands on the teeth along the margin, pilose on outside. Corolla 5-6 mm long; tube 2-2.5 mm, pilose on outside, dorsally split to 1 mm from the base; free part of all lobes c. 3 by 3 mm, acutely acuminate ventral lobes on inside with dark purple papillae and near the throat also with 3 or 4 longitudinal crests. Stamens c. 3 mm, entirely connate; filaments glabrous; anterior anthers 1.5 mm long, the posterior ones c. 1 mm; all connectives papillate, not barbate at tips. Ovary globose, c. 1 mm ø, glabrous; style glabrous; stigmas dark purple, papillate along the margins. Capsule globose, 2.5-3 mm ø, glabrous, thin-walled. Seeds obovoid, c. 0.7 mm long, subtriangular in cross-section, smooth.
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