Crataegus douglasii

"Black Hawthorn" redirects here. For the steam locomotive manufacturer, see Black, Hawthorn & Co.

Crataegus douglasii

Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Rosids
Order:	Rosales
Family:	Rosaceae
Genus:	Crataegus
Section:	Douglasia
Series:	Douglasianae (Loudon) Eggl. ex Rehder^[1]^[2]
Species:	C. douglasii
Binomial name
*Crataegus douglasii* Lindl.

Natural range of Crataegus douglasii
Synonyms
C. brockwayae Sarg.^[3] C. columbiana Howell^[4]

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.

This thorny shrub is native to northern and western North America, where it grows in varied habitats from forest to scrubland. It is most abundant in the Pacific Northwest.

Description

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 place here

Crataegus douglasii var. duchesnensis is now considered to be a synonym of Crataegus saligna.

Images

Straight, stout thorns are one to two centimeters long.^[1]
The white flowers have greenish centers.
The leaf margin is toothed and usually slightly lobed.
The mature bark is grey and rough.^[2]

^ "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 Publishing. p. 73. ISBN 1-55105-042-0.

References

Wikimedia Commons has media related to Crataegus douglasii.

USDA Forest Service: Fire Effects Information System

↑ Phipps, J.B., O’Kennon, R.J., Lance, R.W. (2003). Hawthorns and medlars. Royal Horticultural Society, Cambridge, U.K.
↑ 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(August): 405–408.

External links

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