Orchid cactus blooms at night, since the flowers are predominantly pollinated by bats and large moths. They have large white star-like flowers to help their pollinators locate the blossoms by moon or star light, and many have very lovely fragrances. Pure white flowers, the size of a dinner plate, open as soon as the sun goes down and stay open all night, closing in the morning. It is a shrub growing on trees, freely branched, 2-6 m tall, with aerial roots. Old stems and basal extension shoots round, to 2 m or more, woody; branches numerous, dark green, laterally flattened, leaflike, lanceshaped to oblong-lanceshaped. Areoles small, spineless. Flowers nocturnal, fragrant, funnel-shaped. Sepaloids often recurved, pale green or pinkish red, linear to inverted-lanceshaped. Petaloids white, inverted-lanceshaped to obovate. Filaments white; anthers cream.Fruit rare, purplish red, oblong.
Vinca-Leaved Ceropegia is a herbacious climber with flattened tuber. Stems are twining, hairless. Leaves are ovate with a heart-shaped base and long-pointed tip, with upper surface hairy. Flowers are borne in many-flowered clusters carried on hairy stalks. Flower-stalks are hairless. Flowers are 3-8 cm long, yellowish, with a swollen ovoid portion occupying the lower 1/3 or 1/4 part of the flower-tube. Sepals are linear. Flower tube has purple stripes in the upper half, widening in a funnel-shaped manner towards the mouth. The tube open into 5 petals, 1.5-3.5 long, linear from a triangular-ovate base, pointed at the tip, fused into a narrow ovoid cage. Petals are folded back along the mid-rib, inside velvety, with hairy margin, lower half pale green, upper half dark green.