Osteospermum clandestinum is in Afrikaans called trekkertjie (little puller, little migrant or little tractor)! None of these translations makes easy sense or readily suggests a reason for such a name. Similarly the botanical name has recently been changed from Tripteris clandestina, as DNA studies put paid to the Tripteris genus.
Still, the veil of secrecy or hidden significance in the name is maintained in the specific name of clandestinum, making the blurred photo appropriate.
To add to the somewhat inauspicious foray that the species has had in the domain of nomenclature, the Australians call the plant stinking Roger. Not surprising as it is a weed in their country (Manning, 2007).