Crataegus chrysocarpa Ashe (tetraploid) (Viewed 32 times 
)
)Crataegus douglasii Lindley (allopolyploid) (Viewed 33 times )
)Crataegus macracantha Lodd. ex Loud. (tetraploid) (Viewed 31 times )
)Crataegus suksdorfii (Sarg.) Kruschke (allopolyploid ) (Viewed 33 times )
)Crataegus suksdorfii (Sarg.) Kruschke (diploid ) (Viewed 31 times )
)