Heart-leaf Arnica, Heart-leaf Leopardbane: Arnica cordifolia (Synonyms: Arnica cordifolia var. cordifolia, Arnica cordifolia var. pumila)

The photo above shows heart-leaf arnica as seen next to a DNR rock quarry at about 4100' abreast the ridge dividing the Dairy Creek and Cougar Creek drainages at the southeastern corner of Mt. Adams.................May 29, 2005.

The photo above shows a close-up of the involucre of heart-leaf arnica as seen at 4100' atop the ridge dividing the Cougar and Dairy Creek drainages on the eastern slopes of Mt. Adams.........June 17, 2006. Note the numerous spreading hairs on the involucre.

Heart-leaf arnicas blooming with Packera streptanthifolia at Lone Frank Pass, Wenatchee-Okanogan National Forest........July 29, 2018.

Heart-leaf arnica photographed near the photo above but as one of the earliest members of this species to bloom on the mountain on May 22, 2005.

The photos above show close-ups of the dorsal (left) and ventral (right) surfaces of a basal leaf of heart-leaf arnica. Photographed at 4100' atop the ridge dividing the Cougar and Dairy Creek drainages on the eastern slopes of Mt. Adams........June 17, 2006.