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Hippeastreae is a tribe of plants belonging to the subfamily Amaryllidoideae of the Amaryllis family (Amaryllidaceae). Species in this tribe are distributed in South America. Flowers are large and showy, zygomorphic, with the stamens in varying lengths, inflorescence bracts are often fused basally (along one side). The seeds are flattened, winged or D-shaped. Reported basic chromosome numbers are ''x''= 8-13, 17, and higher. All the species in this tribe presents a remarkable aesthetic interest and horticultural value.〔Meerow,A.W., Charles L. Guy, Qin-Bao Li and Si-Lin Yang (Phylogeny of the American Amaryllidaceae Based on nrDNA ITS Sequences ) Systematic Botany, Vol. 25, No. 4 pp. 708-726 〕 It includes two subtribes: : * subtribe Hippeastrineae - includes species of medium height and often with many flowers in each inflorescence and inflorescence bracts are different in size and fused basally. Genera in this subtribe include ''Placea'', ''Hippeastrum'', ''Phycella'' (includes ''Famatina''), ''Eithea'' (=''Griffiniopsis''), ''Rhodophiala'', and ''Traubia''.〔 : * subtribe Zephyranthinea - includes species of small height with solitary flowers. Inflorescence bracts are fused forming a tube surrounding the pedicel of the flower. Genera in this subtribe are ''Sprekelia'', ''Habranthus'', ''Cooperia'', and ''Zephyranthes''.〔 == 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「Hippeastreae」の詳細全文を読む スポンサード リンク
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