The Flora of Mount Rainier -- a Photographic Journey, by Susan McDougall
Tower Mustard - Turritis glabra
Infrequent and usually seen on dry, disturbed soils at roadsides, but also in dry forest openings, reaching 5000 feet. (Formerly in the genus Arabis.) Photographed along Highway 410 close to the White River entrance on June 17, 2015.