Status of Scouler's Corydalis, Corydalis scouleri (Fumariaceae) in Canada

Abstract

In Canada, Corydalis scouleri is restricted to the Klanawa River/Nitinat River watersheds on southwestern Vancouver Island. There are 20 known populations of Corydalis scouleri in British Columbia, 19 of which were confirmed in the 1997/1998 field season. One site in the Klanawa River valley, reported in 1992 was not visited. Historical growth or decline in size of populations is unknown. Existing populations represent the northern range limits of C. scouleri. British Columbia populations of this species occur in an area that is subject to human disturbance in the form of extensive logging operations, as well as natural disturbance in the form of erosional damage from flooding.