Snowball Saxifrage
Saxifraga rhomboidea (Micranthes rhomboidea)

Family: Saxifrage (Saxifragaceae)
AKA: Diamond-leaf Saxifrage
Photo taken on: July 28, 2007
Location: Cottonwood Pass, CO
Life Zones: Foothills to alpine
Habitat: Meadows and rocky slopes

Flowers are in a single ball or cluster at the top of the stem which may be up to 12". Leaves are thick and basal. Compare to Bog Saxifrage. They can also appear pink.

Flora of North America reference.