Corydalis caseana subsp. hastata

Stems 10-18 dm. Inflorescences profusely branching. Flowers : outer petals with marginal wing moderately developed, distinctly revolute, minutely eroded, apex rounded, distinctly notched.

Flowering early-late summer. In and along streams; 900-1220 m; Idaho.

This subspecies appears to be confined to very wet habitats at intermediate elevations in a few Idaho counties.