1. Crataegus columbiana Howell

    1. This is a synonym of Crataegus douglasii Lindl.

Crataegus columbiana Howell appears in other Kew resources:

First published in Fl. N.W. Amer. 1: 163 (1898)

Sources

Kew Names and Taxonomic Backbone
The International Plant Names Index and World Checklist of Selected Plant Families 2020. Published on the Internet at http://www.ipni.org and http://apps.kew.org/wcsp/
© Copyright 2017 International Plant Names Index and World Checklist of Selected Plant Families. http://creativecommons.org/licenses/by/3.0