Plant erect or spreading, glabrous except a sparse scattered indumentum on inflorescence and young shoots; epicortical runners present. Leaves ovate to orbicular, rounded at apex; lamina 4–8 cm long, 3–6 cm wide, attenuate at base into petiole 5–8 mm long. Inflorescence a pedunculate umbel of triads, the central flower sessile, lateral flowers pedicellate; peduncle robust, 10–25 mm long; rays of umbel c. 6, 6–10 mm long, dilated towards apex; pedicels of lateral flowers 3–4 mm long; bracts erect, concave, thick, c. 3 mm long. Calyx 1.5–2 mm long, truncate, irregularly split. Corolla in mature bud robust, 30–35 mm long, 6-merous, yellow. Anthers 3–4 mm long, equal to free part of filament. Fruit ovoid, c. 8 mm long, contracted into a neck at apex.