The name Crataegus columbiana is a source of considerable confusion. The species named by Howell

Thomas J. Howell (botanist)

Thomas Jefferson Howell was an American botanist from Oregon.-Personal life:Howell was born in Cooper County, Missouri on October 8, 1842.Ornduff, Robert, , Kalmiopsis , Native Plant Society of Oregon, University of Oregon, Eugene, Oregon, pp. 32–41, 2008. He came west with his parents,...

 is now considered to be the same as C. douglasii

Crataegus douglasii

Crataegus douglasii is a North American species of hawthorn known by the common names black hawthorn and Douglas' thornapple. It is named after David Douglas, who collected seed from the plant during his botanical explorations....

, named earlier, and the earlier name should be used instead. 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

Nathaniel Lord Britton

Nathaniel Lord Britton was an American botanist and taxonomist who founded the New York Botanical Garden in the Bronx, New York. Britton was born in New Dorp in Staten Island, New York...

, which is now known as C. chrysocarpa

Crataegus chrysocarpa

Crataegus chrysocarpa is a species of hawthorn that is native to much of the continental US and Canada. Common names fireberry hawthorn and goldenberry hawthorn, as well as the scientific name all refer to the colour of the unripe fruit, although the mature fruit is red.Three varieties C....

 var. piperi.

For C. columbiana var. chrysocarpa (Ashe) Dorn see C. chrysocarpa

Crataegus chrysocarpa

Crataegus chrysocarpa is a species of hawthorn that is native to much of the continental US and Canada. Common names fireberry hawthorn and goldenberry hawthorn, as well as the scientific name all refer to the colour of the unripe fruit, although the mature fruit is red.Three varieties C....

 Ashe.

For C. columbiana var. piperi (Britton) Eggl. see C. chrysocarpa

Crataegus chrysocarpa

Crataegus chrysocarpa is a species of hawthorn that is native to much of the continental US and Canada. Common names fireberry hawthorn and goldenberry hawthorn, as well as the scientific name all refer to the colour of the unripe fruit, although the mature fruit is red.Three varieties C....

 var. piperi (Britton) Kruschke.

For C. columbiana var. occidentalis (Britton) Dorn see C. succulenta

Crataegus succulenta

Crataegus succulenta is a species of hawthorn known by the common names fleshy hawthorn and succulent hawthorn. It is "the most wide-ranging hawthorn in North America", native to much of southern Canada, and the United States as far south as Arizona, New Mexico, Kansas, Missouri, North Carolina,...

Schrad. ex. Link (including C. macracantha var. occidentalis (Britton) Eggl.).