Plants in the Crataegus genus
C
- C. acclivis
- C. aestivalis (Eastern Mayhaw)
- C. altaica (Altai Mountain Thorn)
- C. anomala
- C. apiifolia (Parsley-Leaved Hawthorn)
- C. aprica
- C. armena
- C. arnoldiana
- C. atrosanguinea
- C. azarolus (Azarole)
- C. baroussana
- C. caesa
- C. calpodendron (Pear Hawthorn)
- C. canadensis
- C. canbyi
- C. champlainensis
- C. chlorosarca
C cont.
- C. chrysocarpa (Fireberry Hawthorn)
- C. coccinoides (Kansas Hawthorn)
- C. columbiana (Columbian Hawthorn)
- C. crus-galli (Cockspur Thorn)
- C. cuneata (Sanzashi)
- C. dilatata
- C. dispessa
- C. douglasii (Black Hawthorn)
- C. durobrivensis
- C. ellwangeriana
- C. elongata
- C. festiva
- C. flabellata
- C. flava (Summer Haw)
- C. gemosa
- C. heterophylla
- C. holmesiana
C cont.
- C. hupehensis
- C. illinoiensis
- C. intricata
- C. jackii
- C. jonesiae
- C. laciniata
- C. laevigata (Midland Hawthorn)
- C. lobulata (Red Haw)
- C. macrosperma (Big-Fruit Hawthorn)
- C. maximowiczii
- C. meyeri
- C. missouriensis
- C. mollis (Red Haw)
- C. monogna (Hawthorn)
- C. monogyna (Hawthorn)
- C. nigra (Hungarian Hawthorn)
- ... further results