A couple of small white alpine wildflowers stand out from a sea of smaller lavender ones on a rock on top of Parker Ridge. My botanist friend Janet identified the white flower as dryas octopetala, named for its eight petals. This is actually a flat evergreen dwarf shrub, and has the common names "mountain avens", "white dryas" and "white dryad". The pink flowers are silene acaulis, commonly known as "moss campion".