Cycnium racemosum flower

The flowers of Cycnium racemosum grow in a racemose cluster, which means the stalked flowers are borne along an unbranched axis or peduncle.

Each flower is salver-shaped and two-lipped, deviating slightly from being radially symmetrical. There are small, green, leaf-like bracts below the calyx, around the pedicel. The calyx is tubular, five-lobed and ten-ribbed, darker than the corolla. The conspicuous corolla part is five-lobed on a slender, less seen tube. The lobes are somewhat angularly obovate, white or several shades of pink, spreading around the small mouth and slightly pleated centrally in their lower parts. Flower diameter is up to 6 cm. Each flower has four stamens, their anthers one-celled. The flowers turn black when fading. 

The elongated to ovoid fruit is enclosed in the calyx when ripe (Manning, 2009; iNaturalist; Wikipedia; https://www.botanicalrealm.com).