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''Annona muricata'' is a species of the genus ''Annona'' of the custard apple tree family, Annonaceae, known mostly for its edible fruit. The fruit is usually called soursop due to its slightly acidic taste when ripe. ''A. muricata'' is native to the Caribbean and Central America but is now widely cultivated – and in some areas, becoming invasive – in tropical climates throughout the world. ==Description== ;Habit:''Annona muricata'' is a small, upright, evergreen tree that can grow to about tall. ;Stems and leaves: The young branches are hairy.〔 :Leaves are oblong to oval, to long and to wide. Glossy dark green with no hairs above, paler and minutely hairy to no hairs below.〔 :The leaf stalks are to long and without hairs.〔 ;Flowers: Flower stalks (peduncles) are to long and woody. They appear opposite from the leaves or as an extra from near the leaf stalk, each with one or two flowers, occasionally a third.〔 :Stalks for the individual flowers (pedicels) are stout and woody, minutely hairy to hairless and to with small bractlets nearer to the base which are densely hairy.〔 :Petals are thick and yellowish. Outer petals meet at the edges without overlapping and are broadly ovate, to by to , tapering to a point with a heart shaped base. Evenly thick, covered with long, slender, soft hairs externally and matted finely with soft hairs within. Inner petals are oval shaped and overlap. to by . Sharply angled and tapering at the base. Margins are comparatively thin, with fine matted soft hairs on both sides. The receptacle is conical and hairy. Stamens long and narrowly wedge-shaped. The connective-tip terminate abruptly and anther hollows are unequal. Sepals are quite thick and do not overlap. Carpels are linear and basally growing from one base. The ovaries are covered with dense reddish brown hairs, 1-ovuled, style short and stigma truncate.〔 ;Fruits and reproduction: Dark green, prickly (or bristled) fruits are egg-shaped and can be up to long,〔 with a moderately firm texture. Flesh is juicy, acid, whitish〔 and aromatic.〔 :Abundant seeds〔 the average weight of 1000 fresh seeds is and had an average oil content of 24%. When dried for 3 days in the average seed weight was and were tolerant of the moisture extraction; showing no problems for long-term storage under reasonable conditions. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Annona muricata」の詳細全文を読む スポンサード リンク
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