Tiny unusual yellow flower

Tiny unusual yellow flower

Observation - Tiny unusual yellow flower - Southern Africa. Description: Seen this one for the first time today, only noticed this one plant on the koppie. Flowers are about 10mm diameter Sub-habitat: Robertson Karoo

Seen this one for the first time today, only noticed this one plant on the koppie.
Flowers are about 10mm diameter
11/5 - Subsequently seen many more plants on the koppie (at least 20). Have added another 5 photos.
Sub-habitat: Robertson Karoo