Known to American shoppers under the generic name 'French Butter Pear', grown in this country as pollinator to Bartlett to which it is far superior in interest to the fruit fancier. Conical with heavy russet, fine-textured flesh and unique rosewater aroma. Grown as Gellert's Butterbirne in Germany, its origin the orchard of Bonnet in Boulogne, though named for Hardy, then (1820) director of the royal orchard in the Luxembourg gardens. Harvest mid September, ripe in October. On Betulaefolia.