Mespilus germanica

The medlar is a small tree or large shrub, typically reaching 3–6 meters in height, with a crooked trunk and spreading branches. Its leaves are simple, elliptic, and downy beneath, turning yellow or red in autumn. The flowers, which appear in late spring, are white or pinkish, with five petals, and are borne singly at the ends of short shoots. The fruit is a pome, resembling a small brown apple, with a persistent calyx at the apex. It is hard, acidic, and astringent when picked, and must be bletted—stored until it softens and ferments slightly—before it becomes palatable. Cultivation requires a sunny position and well-drained soil; the tree is hardy and tolerates a range of conditions, though it prefers a temperate climate. Propagation is typically by grafting onto quince or hawthorn rootstocks, as seedlings are variable in quality.

The medlar has been cultivated since antiquity, with references in ancient Greek and Roman texts. It was introduced to central and northern Europe by the Romans, and became a popular fruit in medieval gardens, often featured in monastic orchards and royal estates. The fruit was prized for its unique flavor and was used in preserves, jellies, and as a dessert after bletting. In literature, the medlar appears in the works of Shakespeare, notably in Romeo and Juliet and As You Like It, where it is used as a metaphor for decay and sexuality. By the 19th century, its popularity declined as other fruits became more widely available, but it has seen a resurgence among heritage fruit enthusiasts. The medlar is also known for its use in traditional medicine, where its astringent properties were employed to treat digestive ailments.

Beyond its culinary use, the medlar has several lesser-known facets. The wood is hard and fine-grained, historically used for making small tools and walking sticks. The tree is also a host for the larvae of several moth species, including the medlar moth (Ectoedemia mespilella), which is named after it. In some regions, the fruit is used to make a traditional alcoholic beverage, such as medlar wine or liqueur. The process of bletting is not unique to medlars but is also applied to other fruits like rowan berries and service tree fruits. Interestingly, the medlar is not native to Germany, despite its specific epithet germanica; the name likely arose from a confusion with the German region where it was widely cultivated. Additionally, the medlar has been used in grafting experiments, as it is compatible with many other members of the Rosaceae family.

Mespilus germanica is the only species in the genus Mespilus, though it has been hybridized with hawthorns (Crataegus) to produce intergeneric hybrids, such as × Crataemespilus. Molecular phylogenetic studies have shown that Mespilus is closely related to Crataegus, and some taxonomists have proposed merging it into that genus. The medlar is also related to other pome-fruit trees, including apples (Malus), pears (Pyrus), and quinces (Cydonia). The fruit's structure, with its open calyx, is distinctive among pomes. The species is diploid with 2n = 34 chromosomes, similar to many other Rosaceae. Conservation efforts are minimal, as the species is not considered threatened, but its genetic diversity is preserved in several germplasm repositories, such as the National Fruit Collection in the UK.

Bletting

A process of controlled decay in certain fruits, such as medlars, that softens the flesh and reduces astringency, making them edible.

Pome

A type of fruit produced by plants in the subfamily Maloideae, consisting of a fleshy outer layer and a core containing seeds, as in apples and pears.

Astringent

A taste or property that causes a dry, puckering sensation in the mouth, often due to tannins.

Intergeneric hybrid

A hybrid between plants of different genera, often produced by artificial crossing.