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English hawthorn

English hawthorn

English hawthorn

(Crataegus monogyna)

Priority: -  Contain

Tags: Agricultural | Terrestrial

Identification and Reproduction

Identification

  • English hawthorn is a deciduous shrub or small tree in the Rosaceae family, native to Europe.
  • It grows up to ten metres tall, and is scaly and prickly.
  • It has broad, alternately arranged leaves. New shoots will appear reddish-brown.
  • Leaves are egg-shaped, three to seven lobes, and look like “paws”.
  • They have toothed edges, and are sometimes hairy.
  • Its flowers have pink to white petals, and grow in clusters similar to cherry blossoms.



Reproduction

  • It will produce berries after ten years, and these seeds can be spread by birds, animals, soil, and water.
  • Berries will stay on the tree over the winter.
  • This plant may also spread vegetatively.

Habitat & Ecology

  • English hawthorn becomes bushy and dense and will shade out native plants.
  • It prefers moist soil, such as woodlands, grasslands, and riparian areas.
  • It is drought-tolerant and somewhat shade-tolerant.



Impacts

  • This plant can invade pastures.
  • It grows into thickets within forests, blocking animal movement and crowding out native plants.



Management

  • Remove English hawthorn trees, or use chemical control on the trunks.
  • Trees can be dug out when they are saplings, but after maturing, the roots are too deep and thick.
  • Trees should not be dug out while bearing fruit.

Resources

https://www.kingcounty.gov/services/environment/animals-and-plants/noxious-weeds/weed-identification/common-hawthorn.aspx

https://www.saanich.ca/assets/Community/Documents/Environment/Invasive%20Plants%20Booklet%202015%20web.pdf

https://www.nwcb.wa.gov/weeds/english-hawthorn

http://hort.ufl.edu/database/documents/pdf/tree_fact_sheets/cralaea.pdf

http://ibis.geog.ubc.ca/biodiversity/eflora/Invasive_Species_Checklist_2012.pdf

http://www.goert.ca/documents/InvFS_cratmono.pdf

https://www.cal-ipc.org/plants/profile/crataegus-monogyna-profile/

https://www.nwcb.wa.gov/weeds/english-hawthorn


https://commons.wikimedia.org/wiki/File:Hawthorn_blossom_in_Allesley_1.jpg