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Perennial, herbaceous, twining climber. Stems branched, usually > 2 m long when mature, velvety-pubescent. Leaves herbaceous, usually ovate-lanceolate or ovate, 17-35 x 6.5-17.0 mm, base cuneate to rounded, apex acute to obtuse, glabrous above, velvety underneath; petioles 6-8 mm long. Inflorescences: peduncles somewhat stout, 12-26 mm long; producing 1 or 2 umbel-like, subcorymbose or contracted, 3-7-flowered cymes. Flowers with pedicels 4.0-5.5 mm long. Corolla rotate to spreading-erect, lobes divided to base, ovate or ovate-oblong, 5 x 2.5 mm, apex obtuse, glabrous both sides; dull purple. Staminal corona: lobes tuberculate, subquadrate, apex subacute, keeled down inner surface and fused to rest of gynostegial column, 0.5-0.8 mm tall, equalling but not exceeding truncate style-stigma-head with a small raised central boss.
Perennial, slender, herbaceous, twining climber. Stems much branched, usually > 2 m long when mature, hairy. Leaves subcoriaceous, trullate to ovate, 38-100 x 18-50 mm, midrib prominent, base usually subcordate or subtruncate, round or oblique, apex acute to acuminate, sometimes flexed to one side, thinly pubescent above, glabrous to densely pubescent below; petioles 8-25 mm long. Inflorescence: peduncle 19-63 mm long, producing 2(-4), widely spaced, 5-8-flowered cymes; pedicels 6.0-8.5 mm long. Corolla rotate, divided to base; lobes ovate, 4-5 x 2.5 mm, glabrous on both surfaces; dull green. Staminal corona: lobes tuberculate, ovoid, keeled down inner surface, 0.7-1.4 mm long, equalling truncate style apex with a central boss.
Herbaceous climber; sap clear. Leaves opposite, ovate. Flowers green to yellowish green, inflorescence bracts 1-4 mm long, not forming an involucre.
