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''Astianthus'' is a monotypic genus of flowering plants in the Bignoniaceae family.〔Eberhard Fischer, Inge Theisen, and Lúcia G. Lohmann. 2004. "Bignoniaceae". pages 9-38. In: Klaus Kubitzki (editor) and Joachim W. Kadereit (volume editor). ''The Families and Genera of Vascular Plants'' volume VII. Springer-Verlag: Berlin; Heidelberg, Germany. ISBN 978-3-540-40593-1〕 The sole species is ''Astianthus viminalis''.〔David J. Mabberley. 2008. ''Mabberley's Plant-Book'' third edition (2008). Cambridge University Press: UK. ISBN 978-0-521-82071-4〕 It is known by the common names ''achuchil'' in Mexico and ''chilca'' in Guatemala and Honduras.〔Alwyn H. Gentry. 1992. "Bignoniaceae: Part II (Tribe Tecomeae)". ''Flora Neotropica'' Monograph 25(part 2):1-373.〕 ''Astianthus'' is native to Mesoamerica, from southern Mexico to Nicaragua.〔 It is a shrub, or if larger, a tree of varying height, occurring mostly along streambanks from sea level to in elevation.〔 Its leaves are unusually long and slender, resembling those of a willow, possibly because it is a rheophyte. == Description == The following description is excerpted from one that appeared in ''Flora Neotropica''.〔 * Trees or shrubs, 2-20m tall. * Leaves in whorls of 3, simple, linear, 6–30 cm long and 0.3-1.4 cm wide; midrib prominent; secondaries numerous, strongly ascending. * Inflorescences terminal, paniculate, the lateral branches in whorls of 3. * Calyx campanulate, 5-dentate, the teeth 1-3mm long. * Corolla yellow, 4-5.5 cm long, tubular to infundibuliform, base of corolla narrowly tubular. * Stamens didynamous. * Gynoecium 2.5–3 cm long; the ovary glabrous, its base surrounded by a nectariferous disk. * Fruit fusiform, terete, glabrous, 3–8 cm long; the septum perpendicular to a false septum, the combined structure cruciform in cross section. * Seeds small, borne perpendicular to the septum and parallel to the false septum, the seed body sharply demarcated from the wing. 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「Astianthus」の詳細全文を読む スポンサード リンク
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