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

The photo at left shows heart-leaf arnica as seen under Oregon white oaks on the east bank of the Klickitat River along the River Route Road.........May 3, 2008. The photo at right 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 at left 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. The photo at right shows 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.

Heartleaf arnica blooming in open oak forest at the Klickitat Oaks Phase 2, a Columbia Land Trust property on the south rim of Snyder Canyon, Klickitat County, WA.........May 6, 2024.