Diascia patens flowers

The long-pedicelled Diascia patens flower has a calyx consisting of five small and narrow sepals, two of them slightly bigger.

The two-lipped, pink, wine-red or salmon corolla in variable shades, forms a bowl in its centre with spreading lobes around it. There are four rounded lobes in the upper lip and one in the lower. A yellow spot is present inside the bowl below the central pair of upper lobes and sometimes also dark markings in the base of the bowl. Flower diameter is about 15 mm, the spurs about 7 mm long.

Two down-curved, tapering and diverging spurs emerge from the corolla bowl at the back of the flower. Oil-bearing cells are found inside these spurs. The pollinators are Rediviva bees that collect the oil by pushing their legs into the spurs. 

The four erect stamens cohere, their yellow anthers visible close to the edge of the lower lip in picture and the stigma among them (Vlok and Schutte-Vlok, 2015; Bond and Goldblatt, 1984; iNaturalist; http://pza.sanbi.org).