A healthy bunch of Monsonia spinosa anthers suggests pollen abundance favouring ample seed setting.
Five of the fifteen stamens have longer filaments, their anthers presented at a higher level above the five-branched stigma in the flower centre. The thinly barrel-shaped to oblong anther body has a slit along one side. The anther is attached in its centre to the filament.
The ascending petals show surface veins on their wrinkled surfaces and finely but raggedly toothed upper margins (Le Roux, et al, 2005; iNaturalist).