- Crataegus aemula, Rome Hawthorn
- Crataegus aestivalis, May hawthorn
- Crataegus anamesa, Fort Bend hawthorn
- Crataegus anomala
- Crataegus apiomorpha, Fort Sheridan hawthorn
- Crataegus arrogans, Dixie Hawthorn
- Crataegus austromontana, Valley Head Hawthorn
- Crataegus azarolus
- Crataegus beadlei, Beadles Hawthorn
- Crataegus beata, Dunbars hawthorn
- Crataegus berberifolia, Barberry hawthorn
- Crataegus brachyacantha, Blueberry hawthorn
- Crataegus brainerdii, Brainerds hawthorn
- Crataegus brazoria, Brazos hawthorn
- Crataegus brunetiana
- Crataegus calpodendron, Pear hawthorn
- Crataegus canadensis, Canadian hawthorn
- Crataegus chrysocarpa, Fireberry hawthorn
- Crataegus coccinioides, Large-flowered Cockspurthorn
- Crataegus coleae, Coles hawthorn
- Crataegus collicola
- Crataegus compacta, Clustered hawthorn
- Crataegus compta, Adorned hawthorn
- Crataegus condigna, River Junction Hawthorn
- Crataegus consanguinea, Tallahassee hawthorn
- Crataegus contrita, Southern Hawthorn
- Crataegus corusca, Shiningbranch hawthorn
- Crataegus crus-galli, Cockspurthorn
- Crataegus desueta, New York hawthorn
- Crataegus dilatata, Broadleaf hawthorn
- Crataegus dispar, Aiken Hawthorn
- Crataegus disperma, Spreading hawthorn
- Crataegus dodgei, Dodges hawthorn
- Crataegus douglasii, Black Hawthorn
- Crataegus elliptica
- Crataegus engelmannii, Engelmanns Hawthorn
- Crataegus erythropoda, Cerro hawthorn
- Crataegus exilis, Slender Hawthorn
- Crataegus extraria, Marietta Hawthorn
- Crataegus faxonii
- Crataegus flabellata, Fanleaf hawthorn
- Crataegus flava, Yellowleaf hawthorn
- Crataegus fragilis, Fragile Hawthorn
- Crataegus furtiva, Albany Hawthorn
- Crataegus glabriuscula
- Crataegus glareosa, Port Huron hawthorn
- Crataegus greggiana, Greggs hawthorn
- Crataegus haemacarpa
- Crataegus harbisonii, Harbisons hawthorn
- Crataegus heterophylla, Various-leaved Hawthorn
| - Crataegus hirtiflora
- Crataegus holmesiana, Holmes hawthorn
- Crataegus ideae, Concord hawthorn
- Crataegus ignave, Bedford Springs Hawthorn
- Crataegus immanis
- Crataegus impar, Redclay Hawthorn
- Crataegus incaedua
- Crataegus insidiosa, Ozark Hawthorn
- Crataegus integra, Lake Ella Hawthorn
- Crataegus intricata, Langes Thorn
- Crataegus invicta, Fulton Hawthorn
- Crataegus iracunda, Stolonbearing Hawthorn
- Crataegus irrasa, Blanchards hawthorn
- Crataegus jesupii, Jesups hawthorn
- Crataegus jonesiae, Miss Jones hawthorn
- Crataegus kelloggii, Kelloggs hawthorn
- Crataegus kennedyi
- Crataegus kingstonensis, Kingstons hawthorn
- Crataegus lacrimata, Pensacola hawthorn
- Crataegus laevigata, Midland Hawthorn
- Crataegus lanata, Hoary Hawthorn
- Crataegus laneyi
- Crataegus lanuginosa, Woolly hawthorn
- Crataegus lettermanii
- Crataegus limata, Warm Springs Hawthorn
- Crataegus limnophila, Waterloving Hawthorn
- Crataegus lucorum, Grove hawthorn
- Crataegus mackenzii
- Crataegus macrosperma, Bigfruit hawthorn
- Crataegus margaretta
- Crataegus marshallii, Parsely hawthorne
- Crataegus media
- Crataegus membranacea, Tissueleaf hawthorn
- Crataegus mendosa, Albertville hawthorn
- Crataegus mira, Confederate Hawthorn
- Crataegus mollis, Downy hawthorn
- Crataegus monogyna, May
- Crataegus munda, Batesburg Hawthorn
- Crataegus nigra, Hungarian Thorn
- Crataegus nitida, Glossy hawthorn
- Crataegus nitidula, Ontario hawthorn
- Crataegus notha
- Crataegus opaca, Riverflat hawthorn
- Crataegus orientalis, Oriental Hawthorn
- Crataegus pausiaca
- Crataegus pearsonii, Pearsons hawthorn
- Crataegus pedicellata, Pear-fruited Cockspurthorn
- Crataegus penita, Great Smoky Mountain Hawthorn
- Crataegus pennsylvanica, Pennsylvania hawthorn
- Crataegus persimilis, Broad-leaved Cockspurthorn
| - Crataegus pestivalis, Mayhaw
- Crataegus phaenopyrum, Washington hawthorn
- Crataegus pilosa
- Crataegus piperi
- Crataegus poliophylla, Elegant hawthorn
- Crataegus pringlei, Pringles hawthorn
- Crataegus pruinosa, Waxyfruit hawthorn
- Crataegus puberis
- Crataegus pulcherrima
- Crataegus punctata, Dotted Hawthorn
- Crataegus resima, Gulf Hawthorn
- Crataegus reverchonii, Reverchons hawthorn
- Crataegus rigens, Gadsden Hawthorn
- Crataegus rivularis, River hawthorn
- Crataegus rotundifolia
- Crataegus rubrocarnea
- Crataegus rufula, Rusty Hawthorn
- Crataegus saligna, Willow hawthorn
- Crataegus sanguinea
- Crataegus sargentii, Sargents Hawthorn
- Crataegus sicca
- Crataegus simulata
- Crataegus spathulata, Littlehip Hawthorn
- Crataegus spatiosa, New London hawthorn
- Crataegus stenosepala, Duke hawthorn
- Crataegus submollis, Hairy Cockspurthorn
- Crataegus suborbiculata, Caughuawaga hawthorn
- Crataegus succulenta, Round-fruited Cockspurthorn
- Crataegus suksdorfii, Suksdorfs hawthorn
- Crataegus sutherlandensis, Sutherland hawthorn
- Crataegus tanacetifolia, Tansy-leaved Thorn
- Crataegus texana, Texas hawthorn
- Crataegus tracyi, Tracys hawthorn
- Crataegus triflora, Threeflower hawthorn
- Crataegus tristis, Minute Hawthorn
- Crataegus turnerorum, Turners hawthorn
- Crataegus uniflora, Dwarf Hawthorn
- Crataegus vailiae, Miss Vails hawthorn
- Crataegus valida, Rockmart Hawthorn
- Crataegus versuta, Johnny Reb Hawthorn
- Crataegus viburnifolia, Sawtooth hawthorn
- Crataegus viridis, Southern Thorn
- Crataegus vulsa, Alabama Hawthorn
- Crataegus warneri, Warners hawthorn
- Crataegus websteri
- Crataegus x lavallei
- Crataegus x sinaica, Hawthorn
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