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Racosperma
''Racosperma'' (from ancient Greek ''rhakos'', "ragged" or ''rhakodes'', "wrinkled" and ''sperma'', "seed"), commonly known as the wattles or acacias, is a monophyletic genus of 981 species of ''Acacia s.l.'', in the subfamily Mimosoideae of the pea family Fabaceae. All but 10 of its species are native to Australia,〔 where it constitutes the largest plant genus.〔 A number of species have been introduced to various parts of the world, and two million hectares of commercial plantations have been established.〔Midgley and Turnbull〕 The heterogenous group varies considerably in habit, from mat-like subshrubs to canopy trees in forest. The genus was first described from Africa by C. F. P. von Martius in 1829. Several hundred combinations in ''Racosperma'' were published by Pedley in 2003. Following a controversial decision to vote on a new type species for ''Acacia'' in 2005, its species are still referred to as ''Acacia'' by some authors.
==Etymology==
The origin of "wattle" may be an Old Teutonic word meaning "to weave". From around 700 A.D. ''watul'' was used in Old English to refer to the interwoven branches and sticks which formed fences, walls and roofs. Since about 1810 it refers to the Australian legumes that provide these branches.〔
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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