Brachystelma stellatum inspector given lunch

The five-angled depression in the corolla centre of a Brachystelma stellatum flower points its tips in line with the five spreading corolla lobe tips, i.e., each corner bisects a lobe base.

The soft corolla hairs vary in length, absent from the central corona part of the flower, where the interest of the pollinating fly is focussed. The corolla tips may have less hair but are not glabrous here.

Various fly species are important in pollinating the brachystelmas, while some other insects also participate. Brachystelma forms part of the subtribal division Ceropegieae within the subfamily Asclepiadoideae in the Apocynaceae family. Member species of Asclepiadoideae have five nectaries in their flowers, situated in the troughs opposite the sepals.

So, flies get fed here, the foul-smelling offerings probably delicious as de gustibus non est disputandum (Smith, et al, 2017; Leistner, (Ed.), 2000); iNaturalist).