"Pulcherrimum" means beautiful. I saw two types of Jacob's Ladder, the "beautiful" kind and the "Tall" kind. I photographed these flowers on the Flat Top Mountain trail.
These tiny alpine plants grow in low, thick mats high in the mountains above the tree line. In Alaska, the tree line can be as low as 2000 feet above sea level. These flowers are in the Heath family.
I found this plant blooming along the Savage River trail in Denali National Park in early July.