mmmm, I think it might be A.falconeri - I have known several small asters, ranging from the common a.dumosus ( practically annuals for me) through to a (very short-lived) south african, a.natalensis, from back in my scree garden days. Should be hardy, but will require that mythical moist but well-drained soil.
Do keep us up to date on its performance.

Do keep us up to date on its performance.

UPDATE:

Here it is 3 months later.

It has grown lots in diameter and still remained very short.

But the 'washed out' pink of the blooms.is not so special.

This post was edited by rouge21 on Sat, Sep 21, 13 at 6:29