Crataegus opaca, known as the western mayhaw, is a shrub or small tree of the southern United States.

Crataegus opaca can be characterized as either a small tree or large shrub, with typical height ranging from 12–36 feet (3.7–11.0 m).

[3] It has oval, dark green leaves and when in bloom, clusters of pink or white flowers.

[3] This species prefers wet, rich, and acidic soils, and is located in low woods, creeks, and river bottoms, often in standing water.

[3][4] Its native distribution ranges from Alabama west to Texas, and north to Arkansas.