Origin: France, of uncertain parentage, known since 1830.
Tree: high vigour and poor affinity with quince; very productive, fruits mainly on spurs.
Fruit: large size, elongated bottle- or pear-shape; bronze russetted skin on yellow background, flesh of medium texture and excellent flavour, sweet and aromatic.
Overall: of interest for quality, appearance and storage potential of the fruit. Common in northern Italy.
Synonyms: Imperatore Alessandro, Kaiser Alessandro, Beurré Bosc.

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