As per efi thread :
The telling difference between Gazania and Arctotis is the outer involucre bracts which form a tube in Gazania whereas they are usually free or slightly united at base only;
Arctotis (Asteraceae (Compositae)) page with images of species in efloraofindia : 1 post by 1 author.
If you find any mis-identification, pl. let us know. If anybody can send images of other species of this genera (for incorporation in the website), if any, it will be really nice.