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''Bromheadia'', abbreviated as Brom in horticultural trade, is a genus of about 29 species of orchids native to the region stretching from Myanmar and Vietnam south to Java and east to New Guinea and the Philippines, with a few species extending to Sri Lanka and Queensland.〔(Kew World Checklist of Selected Plant Families )〕 It is the only genus in the alliance ''Bromheadia''. == Species == The genus is subdivided into two sections identified by the clear morphological difference in the shape of the leaves: section ''Bromheadia'' has dorso-ventrally flattened leaves whereas section ''Aporodes'' has laterally-flattened leaves.〔Kruizinga, J., H.J. van Scheindelen, and E.F. de Vogel. 1997. Revision of the genus ''Bromheadia'' (Orchidaceae). ''Orchid Monographs'', 8: 79-118, figures 29-55, plates 4b-5b.〕 While these two sections represent natural groups with clear morphological support, a 1997 phylogenetic study of the relationships within ''Bromheadia'' that used only morphological characters and placed ''Claderia'' as the outgroup concluded that while section ''Aporodes'' was monophyletic, section ''Bromheadia'' was paraphyletic. To resolve the conflict, the study's authors suggested that section ''Bromheadia'' either absorb section ''Aporodes'' to make one large monophyletic genus with no infrageneric subdivisions or to divide section ''Bromheadia'' into the three monophyletic groups they identified within it so that the genus would have four sections.〔Repetur, C.P., P.C. van Welzen, and E.F. de Vogel. 1997. Phylogeny and historical biogeography of the genus ''Bromheadia'' (Orchidaceae). ''Systematic Botany'', 22(3): 465-477.〕 However, no further taxonomic work has acted on this suggestion so the genus remains with two natural sections: ;Section ''Bromheadia'' *''Bromheadia alticola'' Ridl. *''Bromheadia borneensis'' J.J.Sm. * *''B. borneensis'' var. ''borneensis'' * *''B. borneensis'' var. ''longiflora'' Scheind. & de Vogel *''Bromheadia crassiflora'' J.J.Sm. *''Bromheadia divaricata'' Ames & C.Schweinf. *''Bromheadia finlaysoniana'' (Lindl.) Miq. *''Bromheadia pendek'' de Vogel *''Bromheadia rupestris'' Ridl. ;Section ''Aporodes'' *''Bromheadia annamensis'' Aver. & Averyanova *''Bromheadia aporoides'' Rchb.f. *''Bromheadia benchaii'' J.J.Wood & A.L.Lamb *''Bromheadia brevifolia'' Ridl. *''Bromheadia cecieliae'' Kruiz. *''Bromheadia coomansii'' J.J.Sm. ex Kruiz. & de Vogel *''Bromheadia devogelii'' Kruiz. *''Bromheadia ensifolia'' J.J.Sm. *''Bromheadia gracilis'' Kruiz. & de Vogel *''Bromheadia graminea'' Kruiz. & de Vogel *''Bromheadia grandiflora'' Kruiz. & de Vogel *''Bromheadia humilis'' Kruiz. & de Vogel *''Bromheadia latifolia'' Kruiz. & de Vogel *''Bromheadia lohaniensis'' Kruiz. & de Vogel *''Bromheadia longifolia'' Kruiz. & de Vogel *''Bromheadia pungens'' Ridl. *''Bromheadia robusta'' Kruiz. & de Vogel *''Bromheadia scirpoidea'' Ridl. *''Bromheadia srilankensis'' Kruiz. & de Vogel *''Bromheadia tenuis'' J.J.Sm. *''Bromheadia truncata'' Seidenf. ;Insufficiently known *''Bromheadia falcifolia'' Schltr. - all known herbarium specimens were destroyed during World War II. 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「Bromheadia」の詳細全文を読む スポンサード リンク
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