Evening vygie - I can't identify it

Evening vygie - I can't identify it

Observation - Evening vygie - I can't identify it - Southern Africa. Description: Sprawling annual? (most of plants look dead, although live branches are emeging from dead-looking plants.Flower opens at sundown. Bright magenta water storage bodies (or whatever they are called) on surface of leaves and buds .

Sprawling annual? (most of plants look dead, although live branches are emeging from dead-looking plants.Flower opens at sundown.
Bright magenta water storage bodies (or whatever they are called) on surface of leaves and buds .