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''Dryandra'' subg. ''Diplophragma'' is an obsolete subgenus within the former genus ''Dryandra'' (now ''Banksia'' ser. ''Dryandra''). It was first published by Robert Brown in 1830, but was discarded by George Bentham in 1870. It was reinstated with a new circumscription by Alex George in 1996, but was ultimately discarded again in 2007 when Austin Mast and Kevin Thiele sunk ''Dryandra'' into ''Banksia''. ==According to Brown== ''Diplographma'' was first published by Brown in his 1830 ''Supplementum primum prodromi florae Novae Hollandiae''. Brown's arrangement divided ''Dryandra'' into three groups according to what Brown perceived to be variations in the number of seed separators. He allowed for these groups to be treated at subgenus or section rank, but they are now treated as having been published as sections. ''D.'' sect. ''Diplophragma'' was defined as containing a single species, ''D. bipinnatifida'' (now ''Banksia bipinnatifida''), which Brown thought contained two seed separators.〔 The epithet ''Diplophragma'' is from the Greek ''diplo'' ("two") and ''phragma'' ("barrier"). It is not clear how Brown came to believe that this species has two seed separators, as it actually has none. The placement and circumscription of ''D.'' sect. ''Diplophragma'' in Brown's 1830 arrangement may be summarised as follows: :''Dryandra'' (now ''B.'' ser. ''Dryandra'') ::''Dryandra verae'' (18 species) ::''D.'' sect. ''Diplophragma'' :::''D. bipinnatifida'' (now ''B. bipinnatifida'') ::''D.'' sect. ''Aphragma'' (4 species) :''Hemiclidia'' (1 species) 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「Dryandra subg. Diplophragma」の詳細全文を読む スポンサード リンク
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