Ammocharis Coranica, 'Ground lily', (Hluhluwe-Imfolozi, South Africa).
Agapanthus (Hluhluwe-Imfolozi, South Africa). If you were wondering where all that Agapanthus came from, it's from Southern Africa.
Earlier this century it was decided to split the old genus of Acacia into several natural groups. The majority of species in the genus are found in Australia, and so it was decided most of these retained the genus name of Acacia.
These Acacias tend to have flowers in balls (capitate inflorescences), and spines on the stems.
Vachellia (Acacia) sieberiana, the 'Paperbark Thorn'
These Acacias tend to have flowers in spikes (spicate inflorescences), and lack spines on the stems.
Sterculia appendiculata. Found in tropical woodlands and riverine forest in eastern Africa.