| armenia | | crataegus orientalis | species | 2 | 0 |
| bulgaria | | crataegus nigra | species | 24 | 0 |
| canada | | crataegus brazoria | species | 5 | 0 |
| canada | | crataegus calpodendron | species | 3 | 0 |
| canada | | crataegus mollis | species | 3 | 0 |
| canada | | crataegus mollis var. texana | varietas | 7 | 0 |
| canada | | crataegus mollis var. viburnifolia | varietas | 3 | 0 |
| canada | | crataegus mollis x crataegus viridis | species | 10 | 0 |
| canada | | crataegus punctata | species | 16 | 0 |
| canada | alberta | crataegus aquacervensis | species | 7 | 0 |
| canada | alberta | crataegus rivuloadamensis | species | 3 | 0 |
| canada | alberta | crataegus sheridana | species | 4 | 0 |
| canada | british columbia | crataegus atrovirens | species | 29 | 0 |
| canada | british columbia | crataegus chrysocarpa | species | 43 | 0 |
| canada | british columbia | crataegus douglasii | species | 322 | 0 |
| canada | british columbia | crataegus enderbyensis | species | 52 | 0 |
| canada | british columbia | crataegus monogyna | species | 22 | 0 |
| canada | british columbia | crataegus okanaganensis | species | 24 | 0 |
| canada | british columbia | crataegus okennonii | species | 2 | 0 |
| canada | british columbia | crataegus orbicularis | species | 34 | 0 |
| canada | british columbia | crataegus phippsii | species | 6 | 0 |
| canada | british columbia | crataegus sheila-phippsiae | species | 10 | 0 |
| canada | british columbia | crataegus shuswapensis | species | 21 | 0 |
| canada | british columbia | crataegus sp. tad-2013 | species | 2 | 0 |
| canada | british columbia | crataegus suksdorfii | species | 65 | 0 |
| canada | new brunswick | crataegus jonesiae | species | 1 | 0 |
| canada | newfoundland and labrador | crataegus irrasa | species | 2 | 0 |
| canada | ontario | crataegus beata | species | 8 | 0 |
| canada | ontario | crataegus calpodendron | species | 7 | 0 |
| canada | ontario | crataegus chrysocarpa | species | 2 | 0 |
| canada | ontario | crataegus coccinioides | species | 4 | 0 |
| canada | ontario | crataegus compacta | species | 3 | 0 |
| canada | ontario | crataegus crus-galli | species | 4 | 0 |
| canada | ontario | crataegus dodgei | species | 4 | 0 |
| canada | ontario | crataegus douglasii | species | 48 | 0 |
| canada | ontario | crataegus flabellata | species | 1 | 0 |
| canada | ontario | crataegus florifera | species | 5 | 0 |
| canada | ontario | crataegus fluviatilis | species | 3 | 0 |
| canada | ontario | crataegus formosa | species | 7 | 0 |
| canada | ontario | crataegus grandis | species | 4 | 0 |
| canada | ontario | crataegus intricata | species | 1 | 0 |
| canada | ontario | crataegus irrasa | species | 3 | 0 |
| canada | ontario | crataegus macracantha | species | 38 | 0 |
| canada | ontario | crataegus magniflora | species | 5 | 0 |
| canada | ontario | crataegus mollis | species | 9 | 0 |
| canada | ontario | crataegus monogyna | species | 34 | 0 |
| canada | ontario | crataegus monogyna x crataegus punctata | species | 64 | 0 |
| canada | ontario | crataegus perjucunda | species | 4 | 0 |
| canada | ontario | crataegus persimilis | species | 12 | 0 |
| canada | ontario | crataegus phaenopyrum | species | 4 | 0 |
| canada | ontario | crataegus punctata | species | 78 | 0 |
| canada | ontario | crataegus scabrida | species | 6 | 0 |
| canada | ontario | crataegus schuettei | species | 5 | 0 |
| canada | ontario | crataegus sp. tad-2013 | species | 4 | 0 |
| canada | ontario | crataegus submollis | species | 1 | 0 |
| canada | quebec | crataegus chrysocarpa | species | 5 | 0 |
| canada | quebec | crataegus coccinioides | species | 3 | 0 |
| canada | quebec | crataegus macrosperma | species | 6 | 0 |
| canada | quebec | crataegus nigra | species | 4 | 0 |
| canada | quebec | crataegus punctata | species | 2 | 0 |
| canada | saskatchewan | crataegus aquacervensis | species | 20 | 0 |
| canada | saskatchewan | crataegus castlegarensis | species | 17 | 0 |
| canada | saskatchewan | crataegus cupressocollina | species | 28 | 0 |
| canada | saskatchewan | crataegus douglasii | species | 2 | 0 |
| canada | saskatchewan | crataegus purpurella | species | 6 | 0 |
| canada | saskatchewan | crataegus rivuloadamensis | species | 24 | 0 |
| canada | saskatchewan | crataegus rivulopugnensis | species | 25 | 0 |
| canada | saskatchewan | crataegus rubribracteolata | species | 9 | 0 |
| canada | saskatchewan | crataegus sheridana | species | 3 | 0 |
| china | | crataegus altaica | species | 2 | 0 |
| china | | crataegus hupehensis | species | 7 | 0 |
| china | | crataegus maximowiczii | species | 3 | 0 |
| china | | crataegus pinnatifida | species | 10 | 0 |
| china | | crataegus pinnatifida var. major | varietas | 9 | 0 |
| china | | crataegus sanguinea | species | 3 | 0 |
| china | | crataegus scabrifolia | species | 12 | 0 |
| china | | crataegus songarica | species | 1 | 0 |
| china | | crataegus sp. bop010018 | species | 1 | 0 |
| china | beijing | crataegus kansuensis | species | 3 | 0 |
| china | beijing | crataegus pinnatifida | species | 12 | 0 |
| china | beijing | crataegus sp. bop010018 | species | 3 | 0 |
| china | beijing | crataegus sp. bop010478 | species | 3 | 0 |
| china | hebei | crataegus kansuensis | species | 2 | 0 |
| china | yunnan | crataegus scabrifolia | species | 2 | 0 |
| cyprus | | crataegus azarolus | species | 2 | 0 |
| denmark | | crataegus russanovii | species | 3 | 0 |
| egypt | | crataegus sinaica | species | 1 | 0 |
| france | | crataegus laevigata | species | 1 | 0 |
| france | | crataegus monogyna | species | 3 | 0 |
| germany | brandenburg | crataegus curvisepala | species | 2 | 0 |
| germany | brandenburg | crataegus laevigata | species | 2 | 0 |
| germany | brandenburg | crataegus monogyna | species | 2 | 0 |
| greece | | crataegus heldreichii | species | 1 | 0 |
| hungary | bacs-kiskun county | crataegus nigra | species | 2 | 0 |
| israel | | crataegus azarolus | species | 1 | 0 |
| italy | | crataegus azarolus | species | 8 | 0 |
| italy | | crataegus monogyna | species | 6 | 0 |
| italy | | crataegus rhipidophylla | species | 4 | 0 |
| italy | umbria region | crataegus monogyna | species | 3 | 0 |
| japan | hokkaido prefecture | crataegus chlorosarca | species | 1 | 0 |
| lebanon | | crataegus azarolus | species | 2 | 0 |
| lebanon | | crataegus monogyna | species | 2 | 0 |
| morocco | | crataegus nevadensis | species | 2 | 0 |
| pakistan | | crataegus monogyna | species | 1 | 0 |
| poland | | crataegus monogyna | species | 3 | 0 |
| poland | mazovia province | crataegus monogyna | species | 1 | 0 |
| russia | | crataegus maximowiczii | species | 3 | 0 |
| russia | | crataegus monogyna | species | 4 | 0 |
| russia | | crataegus pinnatifida | species | 33 | 0 |
| russia | primorsky krai | crataegus pinnatifida | species | 2 | 0 |
| spain | cantabria | crataegus monogyna | species | 0 | 1 |
| switzerland | geneva region | crataegus monogyna | species | 2 | 0 |
| syria | as-suwayda governorate | crataegus azarolus | species | 1 | 0 |
| syria | as-suwayda governorate | crataegus azarolus subsp. aronia | subspecies | 1 | 0 |
| syria | as-suwayda governorate | crataegus sinaica subsp. sinaica | subspecies | 2 | 0 |
| turkey | | crataegus pentagyna | species | 47 | 0 |
| turkey | | crataegus rhipidophylla | species | 1 | 0 |
| united kingdom | | crataegus laevigata | species | 1 | 0 |
| united kingdom | | crataegus monogyna | species | 10 | 0 |
| united kingdom | england | crataegus monogyna | species | 1 | 0 |
| united kingdom | northern ireland | crataegus monogyna | species | 1 | 0 |
| united states | | crataegus brachyacantha | species | 8 | 0 |
| united states | | crataegus castlegarensis | species | 11 | 0 |
| united states | | crataegus kansuensis | species | 8 | 0 |
| united states | | crataegus mollis | species | 1 | 0 |
| united states | | crataegus wilsonii | species | 19 | 0 |
| united states | alabama | crataegus agrestina | species | 3 | 0 |
| united states | alabama | crataegus ashei | species | 12 | 0 |
| united states | alabama | crataegus crus-galli | species | 42 | 0 |
| united states | alabama | crataegus harbisonii | species | 4 | 0 |
| united states | alabama | crataegus lassa | species | 2 | 0 |
| united states | alabama | crataegus marshallii | species | 6 | 0 |
| united states | alabama | crataegus mollis | species | 6 | 0 |
| united states | alabama | crataegus robur | species | 2 | 0 |
| united states | alabama | crataegus sp. tad-2013 | species | 10 | 0 |
| united states | alabama | crataegus spathulata | species | 4 | 0 |
| united states | alabama | crataegus triflora | species | 16 | 0 |
| united states | alabama | crataegus uniflora | species | 3 | 0 |
| united states | arkansas | crataegus viridis | species | 8 | 0 |
| united states | arkansas | crataegus x canescens | species | 18 | 0 |
| united states | california | crataegus castlegarensis | species | 25 | 0 |
| united states | california | crataegus gaylussacia | species | 62 | 0 |
| united states | california | crataegus monogyna | species | 7 | 0 |
| united states | california | crataegus pubescens | species | 3 | 0 |
| united states | california | crataegus suksdorfii | species | 65 | 0 |
| united states | colorado | crataegus erythropoda | species | 25 | 0 |
| united states | colorado | crataegus macracantha | species | 36 | 0 |
| united states | colorado | crataegus rivularis | species | 23 | 0 |
| united states | colorado | crataegus saligna | species | 72 | 0 |
| united states | florida | crataegus michauxii | species | 2 | 0 |
| united states | georgia | crataegus aemula | species | 20 | 0 |
| united states | georgia | crataegus crus-galli | species | 11 | 0 |
| united states | georgia | crataegus spathulata | species | 4 | 0 |
| united states | georgia | crataegus triflora | species | 7 | 0 |
| united states | idaho | crataegus castlegarensis | species | 20 | 0 |
| united states | idaho | crataegus douglasii | species | 38 | 0 |
| united states | idaho | crataegus rivularis | species | 15 | 0 |
| united states | idaho | crataegus suksdorfii | species | 61 | 0 |
| united states | louisiana | crataegus brachyacantha | species | 82 | 0 |
| united states | louisiana | crataegus crus-galli | species | 2 | 0 |
| united states | louisiana | crataegus opaca | species | 3 | 0 |
| united states | louisiana | crataegus spathulata | species | 4 | 0 |
| united states | maine | crataegus jonesiae | species | 2 | 0 |
| united states | maryland | crataegus monogyna | species | 4 | 0 |
| united states | massachusetts | crataegus almaatensis | species | 7 | 0 |
| united states | massachusetts | crataegus chlorosarca | species | 3 | 0 |
| united states | massachusetts | crataegus dahurica | species | 5 | 0 |
| united states | massachusetts | crataegus flavida | species | 4 | 0 |
| united states | massachusetts | crataegus heldreichii | species | 4 | 0 |
| united states | massachusetts | crataegus hupehensis | species | 7 | 0 |
| united states | massachusetts | crataegus kansuensis | species | 4 | 0 |
| united states | massachusetts | crataegus maximowiczii | species | 3 | 0 |
| united states | massachusetts | crataegus songarica | species | 3 | 0 |
| united states | massachusetts | crataegus sp. tad-2013 | species | 2 | 0 |
| united states | massachusetts | crataegus turnerorum | species | 2 | 0 |
| united states | massachusetts | crataegus uniflora | species | 8 | 0 |
| united states | massachusetts | crataegus viridis | species | 4 | 0 |
| united states | massachusetts | crataegus wilsonii | species | 28 | 0 |
| united states | mississippi | crataegus ashei | species | 4 | 0 |
| united states | mississippi | crataegus crus-galli | species | 3 | 0 |
| united states | mississippi | crataegus marshallii | species | 4 | 0 |
| united states | mississippi | crataegus sp. tad-2013 | species | 4 | 0 |
| united states | mississippi | crataegus tenax | species | 1 | 0 |
| united states | missouri | crataegus intricata | species | 5 | 0 |
| united states | montana | crataegus chrysocarpa var. piperi | varietas | 6 | 0 |
| united states | montana | crataegus douglasii | species | 18 | 0 |
| united states | montana | crataegus macracantha | species | 23 | 0 |
| united states | montana | crataegus okennonii | species | 16 | 0 |
| united states | montana | crataegus sheridana | species | 2 | 0 |
| united states | montana | crataegus sp. tad-2013 | species | 8 | 0 |
| united states | montana | crataegus suksdorfii | species | 91 | 0 |
| united states | montana | crataegus williamsii | species | 2 | 0 |
| united states | nevada | crataegus rivularis | species | 21 | 0 |
| united states | new mexico | crataegus erythropoda | species | 15 | 0 |
| united states | north carolina | crataegus aemula | species | 3 | 0 |
| united states | north carolina | crataegus intricata | species | 3 | 0 |
| united states | oregon | crataegus castlegarensis | species | 23 | 0 |
| united states | oregon | crataegus douglasii | species | 5 | 0 |
| united states | oregon | crataegus gaylussacia | species | 29 | 0 |
| united states | oregon | crataegus monogyna | species | 22 | 0 |
| united states | oregon | crataegus monogyna x crataegus suksdorfii | species | 54 | 0 |
| united states | oregon | crataegus suksdorfii | species | 247 | 0 |
| united states | south carolina | crataegus aemula | species | 8 | 0 |
| united states | south carolina | crataegus crus-galli | species | 7 | 0 |
| united states | south carolina | crataegus dispar | species | 4 | 0 |
| united states | south carolina | crataegus extraria | species | 3 | 0 |
| united states | south carolina | crataegus iracunda | species | 8 | 0 |
| united states | south carolina | crataegus lassa | species | 5 | 0 |
| united states | south carolina | crataegus sororia | species | 4 | 0 |
| united states | south carolina | crataegus visenda | species | 7 | 0 |
| united states | tennessee | crataegus harbisonii | species | 16 | 0 |
| united states | utah | crataegus rivularis | species | 19 | 0 |
| united states | utah | crataegus saligna | species | 37 | 0 |
| united states | virginia | crataegus chrysocarpa | species | 3 | 0 |
| united states | virginia | crataegus phaenopyrum | species | 2 | 0 |
| united states | virginia | crataegus sp. snp_13_0402 | species | 3 | 0 |
| united states | virginia | crataegus uniflora | species | 9 | 0 |
| united states | washington | crataegus chrysocarpa | species | 37 | 0 |
| united states | washington | crataegus laevigata | species | 12 | 0 |
| united states | washington | crataegus macracantha var. occidentalis | varietas | 7 | 0 |
| united states | washington | crataegus okennonii | species | 56 | 0 |
| united states | washington | crataegus phippsii | species | 24 | 0 |
| united states | washington | crataegus sp. tad-2013 | species | 2 | 0 |
| united states | washington | crataegus suksdorfii | species | 36 | 0 |
| united states | wisconsin | crataegus mollis | species | 3 | 0 |
| united states | wyoming | crataegus rivularis | species | 26 | 0 |