Unknown Asteraceae

[Hoy]

This plant I've had for several years. It is from seed I received from a forgotten source. For some reason I've always anticipated that the flower would be white!
I also had the idea it was a rockery subject but it is almost too tall, about 20cm. Any ideas?

[Maggi Young]

Lovely foliage.  An Anthemis ?

[Philippe]

I have something very similar, Anthemis marschalliana. Could be it, but there may be other anthemis species looking quite the same too. I don't know.

[Hoy]

Thanks. It probably is an Anthemis but I'm not sure it is marschalliana; the foliage is different; unless marschalliana does vary in leaf form.