"Richard Wright" wrote in message
...
This flower is coming up in early summer in a warm temperate garden.

http://www.box.net/shared/static/gdzf2ncm01.jpg

Can anybody give me a lead to its ID? I can't even begin to recognise
the family.

The family is Onagraceae, I'm reasonably sure.
Might it be a low-growing Oenothera species?
The flower in the photo appears abnormal or "semi-double",
with a few extra petallike organs.

After googling for images, this one looks fairly close:
http://www.robsplants.com/plants/OenotKunth.php

cheers