Arctic Bell Heather, Arctic White Heather, Four-angled Mountain Heather, Mountain Heather, White Arctic Mountain Heather
Cassiope tetragona ssp. tetragona
The upper stem leaves and flower of four-angled mountain heather. The ventral keel of each leaf is deeply grooved and is visible here. Photographed on the northern slopes of Thorofare Mt., Denali National Park..................September 7, 2009.
- 
Four-angled mountain heather as seen blooming along the Camp Ridge Trail above Camp Denali, Denali National Park.............June 16, 2012.
A close-up of the orbicular, bell-shaped corolla of four-angled mountain heather as seen on the northern slopes of Thorofare Mt., Denali National Park..................September 7, 2009.
- 
Four-angled mountain heather blooming high on Mount Healy, Denali National Park...............June 14, 2012.
Four-angled mountain heather as seen from atop Camp Ridge, above Camp
Denali...........June 22, 2002.
Paul Slichter
