Source: California Invasive Plant Council

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Crataegus monogyna (hawthorn)

Crataegus monogyna
Crataegus monogyna
Photo courtesy Joseph DiTomaso

Crataegus monogyna (English hawthorn) is a deciduous shrub or small tree (family Rosaceae) found in California along the north and central coast and in the North Coast Ranges. English hawthorn was introduced to California as a landscape ornamental. It has escaped cultivation, growing in moist soil in riparian areas, woodlands and grasslands. At about 10 years of age, the trees begin to produce bright red fruits that are consumed by birds and other animals, who distribute its seeds. The seeds may also be dispersed by human activity or soil and water movement. Effective control may be achieved by manually removing seedlings, cutting down the trees and either removing their roots or painting the trunk with herbicide.

Cal-IPC Inventory rating: Limited

Cal-IPC Resources on Crataegus monogyna

Cal-IPC News Articles

  • None for this species.

Cal-IPC Symposium Proceedings

  • None for this species.

Other Resources on Crataegus monogyna

  • USDA PLANTS database - Federal database with information on identification and distribution, and links to websites in individual states.
  • Jepson Online Interchange for California Flora - Information on taxonomy, biology, and distribution from the UC Berkeley Jepson Herbarium.
  • CalFlora - Distribution information by county based on submitted observations and herbarium specimens.
  • CalPhotos - Images of plants taken mostly in California.
  • Natural Resource Projects Inventory - State database with information on resource management projects throughout California. Query by the species of interest.