梨树一种蔷薇科的普遍种植的乔木(梨属西洋梨)，具有光质叶片，白色的伞状花簇，果实可食用。
A widely cultivated tree (Pyrus communis) in the rose family, having glossy leaves, white flowers grouped in a corymb, and edible fruit.
所有的梨亚科是由两个远缘祖先类型双杂交演化的异源多倍体。
All the Pomoideae were allopolyploids drived from a doubled hybrid between two remote ancestral types.
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