Climber, 3 – 10 m long with white latex in all vegetative parts. Stems and branches twining and hanging, terete. Leaves opposite; petiole terete, slender, slightly canaliculate, 1.8 – 3

Herbs, erect, with clear latex in all parts. Leaves opposite, sessile; blade straight, filiform, succulent, coriaceous, base attenuate, margins entire, apex acuminate. Flower solitary, axillary or extra-axillary. Calyx deeply 5-parted,

Climbing epiphyte with white latex in all parts. Leaves opposite; blade thick, rigid, coriaceous, obovate or oblanceolate, margins entire, glabrous; apex aristate-acuminate, recurved; base obtuse to rounded. Inflorescences extra-axillary, umbel,

A twining epiphyte. Leaves broadly ovate, coriaceous, base subcordate to cordate, margins narrowly revolute, apex shortly acuminate, abaxial surface with scattered papillose. Inflorescence 10–49 flowered. Calyx yellowish green, sepals ovate,

Twining herbs. Leaves opposite, linear or linear-laceolate, 6–14 × 0.3–1 cm, chartaceous to coriaceous, apex acute to acuminate, base cuneate, acute to obtuse with 1–2 small ovate colleters, margins entire,

Climbing epiphyte with white latex in all parts. Leaves opposite; blade thick, rigid, coriaceous, obovate or oblanceolate, 5.7–12 × 2.4–3 cm; margins entire, glabrous; apex acuminate, slightly recurved; base acute