Mespilus germanica aka Medlar

Mespilus germanica, commonly known as the medlar or common medlar, is a large shrub or small tree in the rose family Rosaceae. This deciduous tree grows to a height and width of 6 meters and is hardy in zone 6. It has oblong, leathery green leaves that turn yellow-brown in autumn. In late spring, attractive white, cup-shaped flowers bloom, followed by russet-brown fruit. The medlar fruit, also called medlar, has been cultivated since Roman times and is typically available in winter. It is consumed when bletted, either raw or in various cooked dishes. This species is also referred to as Crataegus germanica (Kuntze) when included in the genus Crataegus. In the southwest of England, it has historically had colorful nicknames such as open-arse and monkey's bottom, due to the appearance of its large calyx. The medlar is self-fertile and produces fruit suitable for eating raw, making it one of the largest-fruited medlar cultivars. Its cropping season is from October to early November. Flowering occurs from May to June, and the seeds ripen in November. The plant is hermaphroditic and is pollinated by bees.