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''Chrysophyllum imperiale'' is a tropical tree of the family Sapotaceae native to South America. It is currently classified as an endangered species.〔 This species was first described in 1859 as ''Theophrasta imperialis'', before being given its current name by Joseph Dalton Hooker and George Bentham. It was also classified as ''Martusiella imperialis'' by French botanist J.B. Louis Pierre in 1891. It is known locally in Brazil as ''Marmelleiro do matto''. In 1991 it was placed in section ''Aneuchrysophyllum'' of the genus ''Chrysophyllum'', along with ''C. bangweolense'' and ''C. venezuelanense''. However a combined DNA and morphological study of the subfamily Chrysophylloideae found the two main genera, ''Chrysophyllum'' and ''Pouteria'', to be highly polyphyletic, and that ''C. imperiale'' is not closely related to other members of the genus but instead the genus ''Elaeoluma''. The study authors recommend resurrecting the binomial name ''Martusiella imperialis'' pending further resolution of relationships within the subfamily. ''Chrysophyllum imperiale'' has large firm roundish cuneate-oblanceolate leaves, which measure 15 to 75 cm (6–18 in) long and 5–25 cm (2–10 in) wide. They are smooth above and finely furred on the undersurface, and have a prominent midrib.〔 The leaf margins are serrated, which is an unusual characteristic for the subfamily to which it belongs.〔 It is found in Brazil in the vicinity of Rio de Janeiro, and most of its habitat has been erased by urbanisation and city spread. It is a component of lowland rainforest up to 800 m (2500 ft) altitude, where it grows to be a part of the canopy. An imposing specimen tree in the Royal Botanic Gardens, Sydney was planted by Prince Alfred, Duke of Edinburgh in 1868. Seeds from this plant have been sent to Rio de Janeiro to facilitate recovery of the species there.〔 Three specimens are growing in the Royal Botanic Gardens in Melbourne. It can be grown as a container plant.〔 ==References== 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「Chrysophyllum imperiale」の詳細全文を読む スポンサード リンク
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