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Several cladistic analyses have shown that the genus ''Acacia'' is not monophyletic. While the subg. ''Acacia'' and subg. ''Phyllodinae'' are monophyletic, subg. ''Aculeiferum'' is not. This subgenus consists of three clades. Therefore, the following list of ''Acacia'' species cannot be maintained as a single entity, and must either be split up, or broadened to include species previously not in the genus. This genus has been provisionally divided into 5 genera, ''Acacia'', ''Vachellia'', ''Senegalia'', ''Acaciella'' and ''Mariosousa''. The proposed type species of ''Acacia'' is ''Acacia penninervis''. Which of these segregate genera is to retain the name ''Acacia'' has been controversial. The genus was previously typified with the African species ''Acacia scorpioides'' (L.) W.F.Wright, a synonym of ''Acacia nilotica'' (L.) Delile. Under the original typification, the name ''Acacia'' would stay with the group of species currently recognized as the genus ''Vachellia''. Orchard and Maslin〔A. E. Orchard and B. R. Maslin, 2003. ''(1584) Proposal to conserve the name Acacia (Leguminosae: Mimosoideae) with a conserved type.'' Taxon 52(2): 362–363.〕 proposed a retypification of the genus ''Acacia'' with the species ''Acacia penninervis'' Sieber ex DC., an Australian species that is a member of the largest clade within ''Acacia'', a primarily Australian group formerly recognized as ''Acacia'' subgenus ''Phyllodinae'', on the basis that this results in the fewest nomenclatural changes. Although this proposal met with strong disagreement by some authors,〔M. Luckow, C. Hughes, B. Schrire, P. Winter, C. Fagg, R. Fortunato, J. Hurter, L. Rico, F. J. Breteler, A. Bruneau, M. Caccavari, L. Craven, M. Crisp, A. Delgado S., S. Demissew, J. J. Doyle, R. Grether, S.Harris, P. S. Herendeen, H. M. Hernandez, A. M. Hirsch, R. Jobson, B. B. Klitgaard, J.-N. Labat, M. Lock, B. MacKinder, B. Pfeil, B. B. Simpson, G. F. Smith, M. Sousa S., J. Timberlake, J. G. van der Maesen, A. E. Van Wyk, P. Vorster, C. K. Willis, J. J. Wieringa and M. F. Wojciechowski, 2005. ''Acacia: The Case against Moving the Type to Australia.'' Taxon 54(2): 513–519.〕 it was accepted on 16 July 2005 by the XVII International Botanical Congress in Vienna, Austria. Consequently, the name ''Acacia'' is conserved for 948 Australian species, 7 in the Pacific Islands, 1 or 2 in Madagascar and 10 in tropical Asia. Those outside Australia are split between the genera ''Acaciella'', ''Mariosousa'', ''Senegalia'', and ''Vachellia''. This decision was upheld at the 2011 Congress. In its new circumscription, the genus ''Acacia'' (now limited to the Australian species) has seven subgenera—''Alatae'' (an artificial section), ''Botrycephalae'', ''Juliflorae'', ''Lycopodiifoliae'', ''Plurinerves'', ''Phyllodinae'', and ''Pulchellae'' (see below). The other species, distributed in the Indian Ocean, tropical Asia and tropical America are now classified under * ''Vachellia'' (former subgenus ''Acacia''): 163 species (pantropical) * ''Senegalia'' (former subgenus ''Aculeiferum''): 203 species (pantropical) * ''Acaciella'' (former subgenus ''Aculeiferum'' section ''Filicinae''): 15 species (Americas) * ''Mariosousa'': 13 species related to (and including) ''Acacia coulteri'' (Americas) Two Australian acacias were re-classified under ''Vachellia'', and another two under ''Senegalia''. == Species List == This is a list of species that belong to ''Acacia sensu stricto''. For species that have been transferred to other genera, see ''Acaciella'', ''Mariosousa'', ''Senegalia'', and ''Vachellia''. 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「List of Acacia species」の詳細全文を読む スポンサード リンク
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