Thank you David and Luc.
I have 6 plants grown from wild seed from Alplains. Sown in December 2013 and germinated in February 2014. I don't remember when I pricked them out but they languished in small pots for a few years. I potted them into 3 inch pots last year and 5 are flowering now. They were supposed to be pure white but all have some degree of pink veining. They hide under the bench when dormant and probably did not get watered enough in previous years .