Arctotis comes to mind...

Here is a link that might be useful: Arctotis pictures

Another thing that looks like a daisy is osteospermum.

Here is a link that might be useful: Osteospermum

Could also be Euryops pectinatus or a Felicia (various kinds ) or even a Gazania.

Here is a link that might be useful: PlantzAfrica

Most likely it is the annual Namaqualand Daisy which flowers profusely in late winter/spring.
It would be Dimorphotheca sinuata for the orange one, Dimorphotheca pluvialis for the white flowering one.
Maddy

In Australia, African daisy is Osteospermum. They grow very easily from seed, and are purple or white.

Osteospermum seeds are light brown/tan, papery circles. The dimorphotheca seeds, I believe, are like little twigs. They aren't very long though, and are black in color.

I hope this helps.

Rochelle

http://www.osteospermum.com well worth a look

Here is a link that might be useful: Well worth a look