Androsace cylindrica x hirtella

I need to look these up,they are so pretty..or maybe you could tell me a bit about them,please ?

Androsace hirtella & cylindrica grow in the Pyrenees, the mountain range between France and Spain. It grows at 1800-2500 m in the crevices of limestone cliffs. Seen here growing in a piece of tufa in a raised bed in my alpine house.

Thank you,very interesting..It is so pretty..:o)