No Big Bang, but is it a starburst?

Photograph copyright: DAVID McMAHON (Image ID: 131-6722)

As soon as I saw these plants in our local nursery, I snapped them up - and now they grace the garden at Casa Authorblog. They burst into bloom at the start of spring and are extremely sun-sensitive, so they close up at night and in cloudy conditions.

The plants are called "osteospermum" – the white variety in the foreground is called Afrikaan pearl and the deep pink one in the background is called Afrikaan crystal.