|Natural range of 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.
Crataegus douglasii is a compact erect bushy shrub covered in fan-shaped green leaves with teeth along the distal margin. Thorns along the branches are one to two centimeters long.
White flowers with greenish centers grow in bunches at the ends of each thin branch. The fruit is a very dark purple pome up to about a centimeter across. The fruits were a good food source for Native American peoples such as the Cheyenne and Nlaka'pamux.
Formerly placed within this species
- Crataegus douglasii var. duchesnensis is now considered to be a synonym of Crataegus saligna.
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- Phipps, J.B.; O'Kennon, R.J.; Lance, R.W. (2003). Hawthorns and medlars. Cambridge, U.K.: Royal Horticultural Society. ISBN 0881925918.
- TROPICOS entry for series Douglasianae
- Kruschke, E.P. (1965). "Contributions to the taxonomy of Crataegus". Milwaukee Public Museum Publications in Botany. 3: 11–273.
- Phipps, J.B. (1995). "The identity of Crataegus columbiana and its relationship to C. piperi (Rosaceae)". Taxon. 44 (3): 405–8. JSTOR 1223414.
- "Crataegus douglasii". WTU Herbarium Image Collection. Burke Museum, University of Washington. Retrieved 2009-12-12.
- Pojar, Jim; Andy MacKinnon (1994). Plants of the Pacific Northwest. Lone Pine. p. 73. ISBN 1-55105-042-0.
- Jepson Manual Treatment - Crataegus douglasii
- U.Mich: Ethnobotany
- Crataegus douglasii - Photo gallery
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