Buttonia superba Oberm.

Woody creeper. Stems shortly tawny pubescent becoming glabrous with age. Leaves opposite, pinnatifid usually with 2 lateral pinnae and an apical one; pinnae with a few irregular coarse teeth, cuneate at the base, minutely puberulous. Petiole ±2.5 cm long. Flowers axillary, solitary, massed in the upper part of the stems. Peduncle 2-4 cm long, wiry. Bracteoles small, narrow spathulate, variable in size, up to 10 x 3 mm, deciduous. Calyx campanulate ±2.5 cm long; lobes triangular, ±6 mm long, tips tawny-puberulous, in fruit reticulate, as a consequence of the softer tissues disappearing and the anastomosing nerves persisting. Corolla about 6 cm long; tube 4 cm long, cylindrical in the lower half, suddenly dilated and ventricose in the upper half, ±2.5 cm in diameter at the throat; lobes broadly rounded ±2.5 x 2.5 cm. Stamens in 2 pairs inserted above the cylindrical part of the tube; filaments of upper pair ±1-5 cm long, polliniferous cells ±5 mm long, the empty ones longer and vermiform; filaments of lower pair 2 cm long, empty pollen cells absent. Style exserted ±3 cm long. Capsule thinly woody, hidden by the calyx, ±1.5 cm long. Seeds 3 mm long, angular, alveolate, straw-coloured.