Anyone be able to ID this plant?

Sorry about quality of photographs. :(

I was given these two identical plants by a neighbouring former who said he found them growing soiless on top of a limestone boulder.

There were roots on each plants but the depth of roots were the same depth as blotting paper! I planted them into a soiless mix of lime dust and water. The resultant mix was just like concrete but they're growing!!! and going to flower!





Anyone know what plant they are? I looked up alpine sites, etc but can't find anything close.

 

Similar to Wall Pennywort, but the flowers have a longer spike on that

 

That's it, Zigs. Wall Pennywort. It's only just started to throw a flower shoot. Thanks.