Common Names: Three-nerve Fleabane, Threeveined Fleabane, Triple Nerved Daisy

USDA lists two varieties:
var. conspicuus: WA, ID, MT, WY
var. subtrinervis: Rocky Mtns.

from eFlora.org
Erigeron subtrinervis is variable in vestiture, perhaps reflecting gene exchange with E. speciosus. Erigeron speciosus var. mollis (A. Gray) S. L. Welsh may be a recurrent hybrid; it is identified here within E. subtrinervis.

Note

north & east Olympics
TRAIL: Klahhane Ridge; Marmot Pass
HABITAT: subalpine rocky
ELEVATION: 1,830 - 1,850 m (5,995 - 6,075 ft.)
BLOOM TIME: 08-AUG; 30-JUL