Pictures from nature by Paul Spriggs to take your breath away.....
"Lewisiopsis tweedyi in nature - The Queen of the Rock Garden- pictures from
Wenatchee mountains eastern Washington state
There are low and high elevation populations and yes there are natural variations including pure white.
These are growing on basalt cliffs facing east in semi shade at around 1500 meters.
I believe a recent forest fire opened up the canopy and made them more floriferous than normal."
( the plant formerly known as Lewisia tweedyi)