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Costaceae, or the ''Costus'' family, is a family of pantropical monocots. It belongs to the order Zingiberales, which contains horticulturally and economically important plants such as the banana (Musaceae), bird-of-paradise (Strelitziaceae), and edible ginger (Zingiberaceae). The seven genera in Costaceae together contain about 100 species (1 in ''Monocostus'', 2 in ''Dimerocostus'', 16 in ''Tapeinochilos'', 2 in ''Paracostus'', ''ca.'' 8 in ''Chamaecostus'', ''ca.'' 5 in ''Hellenia'', and ''ca.'' 80 in ''Costus'').〔Chelsea D. Specht & Dennis Wm. Stevenson. 2006. "A new phylogeny-based generic classification of Costaceae (Zingiberales)".''Taxon'' 55(1):153-163. (See ''External links'' below).〕 They are native to tropical climates of Asia, Africa, Central America, and South America. Several species are frequently found in cultivation. == Description == The simple leaves are entire and spirally arranged, with those toward the base of the stem usually bladeless. Leaf bases have a closed sheath with a ligule, or projection at the top of the sheath. Costaceae is different from the other families of Zingiberales in that its species have 5 fused staminodes, rather than 2 or 3, and the Costaceae contain no aromatic oils. The fused infertile stamens form a large petaloid labellum that often functions to attract pollinators. The flowers are solitary in ''Monocostus''. In the other genera, the flowers are borne in a terminal spike that ranges from elongate to nearly capitate. Each flower is subtended by a large bract. The fruit is a berry or capsule. The rhizome is fleshy with tuberous roots. Tapeinochilus ananassae.JPG|''Tapeinochilos ananassae'' (wax ginger) Starr 030807-0069 Costus speciosus.jpg|''Cheilocostus speciosus'' (crêpe ginger) 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「Costaceae」の詳細全文を読む スポンサード リンク
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