The Flora of Mount Rainier -- a Photographic Journey, by Susan McDougall
Hairy Rockcress - Arabis hirsuta
Infrequent at Mount Rainier, this weedy-looking species is found on cliffs and in gravelly places, such as roadsides and forest openings, between 2500 and 5000 feet. The small, four-petaled flowers are white. Photographed along Westside Road on June 25, 2015.