Erigeron salmonensis
Erigeron salmonensis is a rare North American species of flowering plant in the daisy family known by the common name Salmon River fleabane. It has been found only in the Salmon River Canyon in central Idaho. "Erigeron salmonensis " grows on ledges and cracks in north-facing cliffs. It is a perennial herb up to 35 cm (14 inches) tall, forming a woody underground caudex. The inflorescence generally contains only 1-3 flower heads per stem. Each head contains 11–15 white ray florets surrounding many yellow disc florets.