Wyoming Rare Plant Field Guide
Arnica lonchophylla
- Similar Species: A. rydbergii has densely clustered stems, mostly smooth-margined leaves, and tubular disk flowers. A. cordifolia and A. latifolia have pinnately-veined leaves with heart-shaped bases.
- Flowering/Fruiting Period: June-July.
- Distribution: Scattered from Newfoundland to British Columbia, south to N Minnesota. Disjunct in the South Dakota Black Hills and Bighorn Mountains in Wyoming.
- Habitat: Open woods and slopes on sandy-gravel or limestone and shady, moist north-facing birch-hazelnut forests. Elev. 6500-8000 ft.
- References: Bighorn National Forest 1992; Dorn 1992 b; Ediger and Barkley 1978; Fertig 1993 b; Great Plains Flora Association 1986.
