Braya longii

Braya longii, common name Long's Braya or Long's northern rockcress, is a small, herbaceous, arctic-alpine flowering plant that grows only in the cool, wet and windy climate of the coastal limestone barrens of northern Newfoundland. It is a narrow endemic, found in only five populations within a range of 6 km, and in one isolated population 14 km to the south, all in the Strait of Belle Isle ecoregion on the extreme northwest portion of the Great Northern Peninsula of Newfoundland....read more on Wikipedia.