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Pyrus pyraster
''Pyrus pyraster'' (syn. ''Pyrus communis subsp. pyraster''), also called European wild pear, is a species of pear belonging to the Rosaceae family.
This wild pear and ''Pyrus caucasica'' (syn. ''P. communis'' subsp. ''caucasica'') are thought to be the ancestors of the cultivated European pear (''Pyrus communis'' subsp. ''communis''). Both the wild pears are interfertile with domesticated pears.
It is sometimes difficult to distinguish ''Pyrus pyraster'' from a common pear. ''Pyrus pyraster'' can reach an age of 100 to 150 years.
==Description==
''Pyrus pyraster'' is a deciduous plant reaching in height as medium sized shrub and as a tree.〔Pignatti S. - Flora d'Italia – Edagricole – 1982. Vol. I, pag. 603〕 Unlike the cultivated form the branches have thorns.〔 The leaves are ovate with serrated margins. The flowers have white petals. The stamens are equal to the length of styles.〔 The flowering period extends from April through May.〔 The fruits reach in diameter.〔 and ripens in late Summer to early Autumn.They are quite hard and astringent, but they have a sweet taste and are edible when they are really ripe and fall from the tree.〔 The seeds ripen in September.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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