Crataegus monogyna

Crataegus monogyna_English hawthorn_JM DiTomaso
Photo: Joseph DiTomaso

Synonyms: Crataegus apiifolia, C. curvisepala, C. dissecta, C. oxyancanthana, C. oxyacantha var. monogyna, C. oxyacantha v. paulii, Mespilus monogyna, Oxyacantha apiifolia, others.

Common names: English hawthorn; common hawthorn; oneseed hawthorn; May tree; singleseed hawthorn; azzarola; neapolitan medlar; oneseed hawthorn; whitethorn;

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 Rating: Limited?

CDFA Rating: None?


Plant Assessment Form - Information gathered by Cal-IPC on the impacts, rate of spread, and distribution of invasive plants in California. Does not include management information.

Weed Management Notes

  • Management Notes - Information on management techniques and effectiveness from the University of California Cooperative Extension’s Weed Research & Information Center.

Cal-IPC Newsletter Articles

There are no newsletter articles associated with this species yet.

Cal-IPC Symposium Presentations

Presentations are linked where available. Where a presentation is not available, find more information by reading the abstract in the Cal-IPC Symposia Archive.

There are no Symposium presentations associated with this species yet.

Other Crataegus monogyna Information

  • CalPhotos - Images of plants taken mostly in California.
  • Calflora - Distribution map and records of this species in California.
  • CalWeedMapper - Distribution map of this species in California with ability to determine regional priorities.
  • EDDMapS - Distribution of this species in North America.
  • Jepson Interchange - Information on this plant's taxonomy, biology, and distribution from UC Berkeley's Jepson Herbarium.
  • USDA PLANTS Database - Information on identification and distribution, with links to websites in individual states.
  • Additional photos

    Crataegus monogyna_flowers_JM DiTomaso
    Crataegus monogyna (English hawthorn) flowers. Photo: JM DiTomaso