Common Name: Hawthorn
Scientific Name: Crataegus spp.
Leaf: Deciduous; simple; alternate; small, 4-10 cm long, sharp teeth of two sizes;
larger leaves on short shoots.
Flower: Flat-topped clusters at tip of dwarf shoots; showy; 5 greenish sepals; 5 white
or pink petals; 5-25 stamens; 1-5 pistils; 1-2 cm across.
Fruit: Similar to a small apple; thin flesh; 1-2 seeds; can be red, orange, yellow,
blue, or black, edible, remain on trees in winter.
Twig: Can have long and dwarf shoots; long shoots are straight or zigzag, lustrous,
pale grey to orange brown, smooth shiny rigid sharp thorns; dwarf shoots often has
terminal flower cluster and fruit.
Bark: Separated evenly into firm shreds; loose on both ends.
Wood: Hard; heavy.
Facts About this Tree
1. Hawthorns hybridize freely which makes it difficult to identify the specific species
because the progeny are an intermediate between the parent trees.
2. Hawthorns can produce seeds without fertilization producing trees that are identical
to the parent, which is called apomixes.
3. The Hawthorns are a genus of small trees and coarse shrubs that contain over a 100
species native to North America and 30 native to Canada.
4. Natives used Hawthorn spines as fishhooks and needles.
Diameter (DBH): 8.9 cm
Last Year Modified: 2015
Carbon Stored in this Tree: 11.00 kg of C
Equivalent CO2: 40.34 kg of C
1. Farrar, J. L. 2007. Trees in Canada. ON. Canadian Forest Service.
2. Kershaw, Linda. 2001. Trees of Ontario. Edmonton, AB Canada. Lone Pine Publishing.
3. Hawthorn Crataegus spp. Center for Forest Conservation Genetics. University of
British Columbia. Retrieved on July 3, 2015 from
4. Photo Credit: Lokal_Profil [CC BY-SA 2.5
(http://creativecommons.org/licenses/by-sa/2.5)], via Wikimedia Commons.
5. Photo Credit: VoDeTan2 (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html) or CC
BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons.
6. Photo Credit: Magnus Manske (Own work) [CC BY-SA 3.0
(http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons.
7. Photo Credit: Walter Siegmund (Own work) [GFDL (http://www.gnu.org/copyleft/fdl.html)
or CC BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0)], via Wikimedia Commons.
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