What`s this plant?

Hi ,Can anyone name this plant for me,i have had it for a few years now,it seemed to be dormant then i moved it into full sun and hey presto it burst into life. It has tiny rosettes,and the tiny rosette petals drop off at the slightest touch and can be used to grow new plants.I think i got it from the alpine section of a garden centre.Thank you.

 

If this is the same plant, it is sedum. Hope somebody can tell which one

 

Hi,Barvinok,
Yea the rosettes are the same,but its never had the long stems growing from it.But now i know which family it is from i cant search in the gardening books i have for it.Thanks for your help.

 

Try Sedum dasyphyllum. Joe

 

Thank you Joe, this is the one!

i_hate_slugs - long stems are flower stems :-)