Perennial herb. Stems hairy, climbing by twining petioles. Petioles to 3 cm long, slender, hairy. Lamina 5-7.5 × 5-7.5 cm, triangular-ovate, hairy, strongly dentate with mucronate teeth and a small basal lobe on each side; base cordate; apex slender, acute. Pedicels > petioles. Calyx c. 2 cm long, hairy, especially on lobes; lobes lanceolate or narrow-ovate, mucronate, c. 3/4 length of tube. Corolla c. 7 cm long; lobes deep pink; throat paler; tube slightly swollen at base, with longitudinal hairy bands inside and hairy ring above base; lobes rounded, somewhat 2-lipped. Lower stamens c. = corolla tube. Capsule c. 1.5 cm diam., globose. Seeds covered with finger-like reticulate appendages; wing broad, fimbriate, lacerate.
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