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''Critonia'' is a genus of flowering plant in the subtribe Eupatorieae of the sunflower family.〔〔(Browne, Patrick. 1756. The Civil and Natural History of Jamaica in Three Parts page 490 )〕〔(Tropicos, ''Critonia'' P. Browne )〕 The most notable trait that characterizes the genus is the presence of pellucid punctations caused by internal secretory pockets of the leaves - to be seen these must be viewed with a hand lens while holding the leaf up to light in most species of the genus. Most species of ''Critonia'' also have smooth opposite leaves, a shrubby habit, unenlarged style bases, relatively few (3-5) flowers per head, and imbricate involucres.〔King, R. M. and H. Robinson. 1987. The genera of the Eupatorieae (Asteraceae). Monographs in Systematic Botany, Missouri Botanical Garden 22: 1-581.〕 ;Species The genus is native to Mexico, Central America, South America, and the West Indies.〔 == References == 〔 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「Critonia」の詳細全文を読む スポンサード リンク
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