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''Acacia maidenii'', also known as Maiden's wattle, is a tree native to Australia (New South Wales, Queensland and Victoria). It has been introduced into India, (Tamil Nadu) and Argentina, and it grows on plantations in South Africa.〔 ==Description and habitat== It prefers full sun to partial shade and it is often found on the edge of the rainforest.〔 〕 It grows up to 20 m height in an erect or spreading habit.〔http://plantnet.rbgsyd.nsw.gov.au/cgi-bin/NSWfl.pl?page=nswfl&lvl=sp&name=Acacia~maidenii〕 The phyllodes are dark green, alternate along the stem and reach 20 cm in length and 1 to 3 cm in width.〔 〕 It is very fast growing, reaching 1.5 m tall in as little as five months.〔 〕 Its flowers have pale yellow spikes up to 6 cm long〔 that often occur in clusters of two to three.〔 The fruit is hairy, about 15 cm long and narrow,〔 often becoming coiled.〔 In the Australian state of Victoria it is listed as being an endangered species,〔(Flora and Fauna Guarantee Action Statement ) State of Victoria Department of Sustainability and Environment, 2003〕 however it is a common species through much of the rest of its range.〔 The tree has a lifespan of more than 30 years.〔(Lycaeum )〕 It grows approximately 1 m per year.〔 〕 It is frost tolerant down to -7 °C〔 〕 (about 19 °F), but it is not drought tolerant, so irrigation may be necessary in some growing areas.〔 In its natural range, it tends to grow in places with an average maximum temperature of about 25 °C, but it also exists in a range of 22-32 °C avg. max. temp.〔 〕 It tends to grow primarily in areas near the coast averaging 1200–1600 mm/year of rainfall, but overall it is found to some extent in an areas ranging 600–2000 mm/year of rainfall.〔 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「Acacia maidenii」の詳細全文を読む スポンサード リンク
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