The name Crataegus columbiana is a source of considerable confusion.
[1] However, some varieties of C. columbiana have also been named that are not related to C. douglasii.
C. columbiana has been used by some authors for Crataegus piperi Britton, which is now known as C. chrysocarpa var.
occidentalis (Britton) Dorn see C. succulenta Schrad.
Link (including C. macracantha var.