Does anyone have any ideas what this daisy may be?

http://www.hortiphoto.com/transfers/HPA2812.jpg

It's a subshrub or evergreen perennial around 40-50cm high, the flowerheads
are up 5cm diameter and I photographed it today, which is midwinter here in
New Zealand. It's been flowering for several months and shows no sign of
stopping. The garden is in a frost-free area.

--
Geoff Bryant
www.hortiphoto.com