Okay, I will place the photos in the Corydalis micrantha and see if anyone raises a ruckus. Then will take better, more detailed photos next spring.
Thanks everyone who helped with this. It's been fun and very educational.
@JRsbugs, thanks for helping me to understand spurs...that don't jingle-jangle.
Done: Identified (for now) as Corydalis micrantha.
