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''Roseodendron'' is a genus of flowering plants in the family Bignoniaceae.〔David J. Mabberley. 2008. ''Mabberley's Plant-Book'' third edition (2008). Cambridge University Press: UK. ISBN 978-0-521-82071-4〕 It consists of two species, ''Roseodendron donnell-smithii'' and ''Roseodendron chryseum''. The type species for the genus is ''R. donnell-smithii''.〔''Roseodendron'' In: Index Nominum Genericorum. In: Regnum Vegetabile (see ''External links'' below).〕 Both species are cultivated as ornamentals for their numerous, large, yellow flowers.〔Anthony Huxley, Mark Griffiths, and Margot Levy (1992). ''The New Royal Horticultural Society Dictionary of Gardening''. The Macmillan Press,Limited: London. The Stockton Press: New York. ISBN 978-0-333-47494-5 (set).〕 ''Roseodendron donnell-smithii'' is known colloquially as primavera. It is the larger and more frequently planted of the two species.〔George W. Staples and Derral R. Herbst. 2005. "A Tropical Garden Flora" Bishop Museum Press: Honolulu, HI, USA. ISBN 978-1-58178-039-0〕 Its wood is sometimes used to make furniture.〔 It is native to Central America and southern Mexico, but is grown thruout the tropics.〔 ''Roseodendron chryseum'' is endemic to the dry forests of northern Colombia and northwestern Venezuela. It is known as araguaney, a name that also applies to ''Handroanthus chrysanthus''. It differs from ''R. donnell-smithii'' in its smaller stature, smaller fruit, and more compact inflorescence. The inflorescence is a panicle, but appears racemose because of the short lateral branches and pedicels.〔Alwyn H. Gentry. 1992. "Bignoniaceae: Part II (Tribe Tecomeae)". ''Flora Neotropica'' Monograph 25(part 2):1-373.〕 Both species have been placed in ''Cybistax''〔 and in ''Tabebuia'',〔 and they were thought to be closely related to ''Handroanthus''. In 2007, a molecular phylogenetic study showed that ''Roseodendron'' is not closer to ''Tabebuia'' than ''Ekmanianthe'', not closer to ''Cybistax'' than are ''Godmania'' and ''Zeyheria'', and not closer to ''Handroanthus'' than are ''Spirotecoma'', ''Parmentiera'', ''Crescentia'', and ''Amphitecna''.〔Susan O. Grose and Richard G. Olmstead. 2007. "Evolution of a Charismatic Neotropical Clade: Molecular Phylogeny of ''Tabebuia'' s.l., Crescentieae, and Allied Genera (Bignoniaceae)". ''Systematic Botany'' 32(3):650-659.〕 The authors recommended that ''Roseodendron'' be resurrected from ''Tabebuia'', under which most authors of that time had synonymized it.〔Susan O. Grose and Richard G. Olmstead. 2007. "Taxonomic Revisions in the Polyphyletic Genus ''Tabebuia'' s.l. (Bignoniaceae)". ''Systematic Botany'' 32(3):660-670.〕 == Description == * The wood is not especially heavy or hard, like that of ''Handroanthus''. * The indumentum is of lepidote scales and small glandular hairs. * The inflorescence has an erect and sturdy central rachis. * The calyx is spathaceous, usually somewhat viscid, and is soft and thin like the corolla. * The corolla is yellow and sometimes has thin, red lines. * The fruit is bullate and irregularly costate. The calyx texture and inflorescence structure of ''Roseodendron'' distinguish it clearly from ''Handroanthus'' and ''Tabebuia''. The fruit ridges are much more conspicuous than those of any species of ''Tabebuia''. 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「Roseodendron」の詳細全文を読む スポンサード リンク
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