Crataegus berberifolia var. engelmannii
Rhodora 10: 76. 1908.
Flowers 10–15 mm diam.; stamens 10, anthers usually pink.
Phenology: Flowering Apr; fruiting Sep–Nov.
Elevation: 10–200 m
Ala., Ark., Kans., La., Miss., Mo.
Variety engelmannii is red-fruited and is the most common variety in Missouri; it extends without break from Kansas to Louisiana and Alabama. Crataegus signata possibly does not belong; it has three to five styles, and Beadle compares it to C. ashei (ser. Bracteatae) in his protologue.