Mespilus germanica (Medlar)
Botanical name: Mespilus germanica
Common name: Medlar
Family: Rosaceae
Origin: Asia Minor
USDA Plant Hardiness Zone Map
Mespilus germanica fruits are hard, acidic, and high in bitter tannins. They become edible after being softened, 'bletted', by frost, or naturally in storage given sufficient time.
+Crataegomespilus is the generic name applied to graft-chimeras between the genera Crataegus and Crataegus.
+Crataegomespilus dardarii
+Crataegomespilus refers to graft-created chimeras combining the genera Crataegus and Mespilus.
Link to this plant:
https://toptropicals.com/catalog/uid/mespilus_germanica.htm