Looking for a unique fruit to add to your garden? Look no further than the Crataegus opaca, also known as the Mayhaw or Riverflat Hawthorn. This small tree or large shrub produces clusters of showy pink or white flowers in the spring, followed by large, edible fruits that ripen from May to June. These fruits are often used to make preserves and jellies, and are prized for their tart flavor. Additionally, both the fruits and flowers of the Crataegus opaca have been known to have a hypotensive effect and act as a mild heart tonic. Native to the United States, this tree is a must-have for any fruit enthusiast.