Trifolium Burchellianum
The International Legume Database and Information Service (ILDIS) notes that Burchell's clover is native to the montane shrublands, grasslands and bamboo thickets of eastern and southern Africa. This species is rarely found in cultivation, despite its attractive, thimble-sized inflorescence. Instead, a trip to Africa would reveal that it is an important perennial legume for livestock grazing at 3000m or higher above sea level.
This (cropped) photograph was taken three years ago, and I've not had the opportunity to verify if these plants remain (it's not something you'd casually notice when not in flower due to its size!).
Photography resource link: "Just Say Yes!", an article by Alain Briot for Nature Photographers Online. After reading this essay, all I can say is "Yes!".
Posted by: Jessica
Source