selected vouchers: Ben Legler 14023, WTU
Notes: Recently established in landscaping in King County, WA. Also known from Vancouver, BC, and as a greenhouse weed in Corvallis, OR. Often confused with or synonymized under C. flexuousa, a polyploid native to western Asia derived from C. amara x C. hirsuta. By contrast, c. occulta is apparently a polyploid derived from C. amara x C. parviflora and a third unknown species. The name Cardamine debilis has been misapplied to C. occulta in North America.