Crataegus monogynaJacq.

common hawthorn

WFO wfo-0001009785 Accepted WFO 2026-06 8 photographs CC0 / CC BY

Plate 1 figs. a–h

Crataegus monogyna, photographed by Derek Winterburn
fig. a Derek Winterburn, CC BY 4.0 / 2022-06-12 / obs. 205550681
Crataegus monogyna, photographed by Julien Lepage
fig. b Julien Lepage, CC BY 4.0 / obs. 205746658
Crataegus monogyna, photographed by Jon Mortin
fig. c Jon Mortin, CC BY 4.0 / obs. 204450257
Crataegus monogyna, photographed by Elizabete Marchante
fig. d Elizabete Marchante, CC BY 4.0 / obs. 203572761
Crataegus monogyna, photographed by Marco Mussita
fig. e Marco Mussita, CC BY 4.0 / obs. 205788302
Crataegus monogyna, photographed by Lisa Phipps
fig. f Lisa Phipps, CC0 1.0 / obs. 205195413
Crataegus monogyna, photographed by David Sandler
fig. g David Sandler, CC BY 4.0 / obs. 202446882
Crataegus monogyna, photographed by Michael Bunsen
fig. h Michael Bunsen, CC0 1.0 / obs. 203115505

Every figure is a research-grade observation under CC0, CC BY or CC BY-SA, rehosted with the photographer’s name, the licence and the observation it came from. Photographs under a NonCommercial licence are excluded from this site and are never stored, which costs us a great many pictures and is not negotiable.

Flowering n = 5,783 observations

Peak flowering in May, from 5,783 community-annotated observations worldwide. This is a global aggregate, not a forecast for your garden: the same species flowers on different dates in different hemispheres, and citizen-science records cluster near cities, at weekends, and in spring. Where a species has fewer than 30 annotated records we do not draw this chart at all.

Also published as 399 synonyms

A synonym is not an error. It is a record of botanists disagreeing, in print, about where this plant belongs. Each of these was somebody’s considered answer.

  • Azarolus maroccana (Lindl.) M.Roem.
  • Crataegus aegeica Pojark.
  • Crataegus aguilaris Sennen
  • Crataegus alemanniensis Cinovskis
  • Crataegus alemanniensis f. microalemanniensis Cinovskis
  • Crataegus alemanniensis var. orientobaltica (Cinovskis) Cinovskis
  • Crataegus alemanniensis var. subborealis (Cinovskis) Cinovskis
  • Crataegus apiifolia Medik.
  • Crataegus azarella Griseb.
  • Crataegus azarolus subsp. triloba (Poir.) Nyman
  • Crataegus azarolus var. glabra Coss.
  • Crataegus azarolus var. heterophylla (Flüggé) Regel
  • Crataegus azarolus var. triloba (Poir.) Mutel
  • Crataegus borealoides R.Doll
  • Crataegus bracteolaris Gand.
  • Crataegus brevispina Kunze
  • Crataegus brevispina f. subinermis Vicioso
  • Crataegus brevispina var. contracta (Hrabětová) Ker.-Nagy
  • Crataegus brevispina var. javorkae (Pénzes) Ker.-Nagy
  • Crataegus brevispina var. microphylla (Csató) Ker.-Nagy
  • Crataegus bruantii CarriŠre
  • Crataegus bruantii Carrière
  • Crataegus calycina var. cuneata Diap.
  • Crataegus chlorocarpa Gand.

and 375 more.

Sourcesevery claim on this page

  1. World Flora Online Plant List. accepted name, authority, classification. CC0. Retrieved 2026-07-12.
  2. iNaturalist. photographs and flowering annotations, CC0 / CC BY / CC BY-SA only. per photograph. Retrieved 2026-06-27.

We publish what we can source and we say so when we cannot. This page has no care advice, no toxicity claim and no native range, because we do not yet have those from a source we can cite.