Greetings,
Douglasia montana is one of the most common plants in western Montana. It grows from the highest elevation, down to the valleys. Pretty much any rocky area will have numerous examples of this plant. Several years ago I found a small plant with white flowers. Last summer while collecting seed from this plant I found numerous seedlings that also had white flowers. Please see attached photos:
The main plant:
A small seedling:
The typical pink flowered form growing on a limestone cliff: