A medium-sized tree of the palm family, with a single or fascicular trunk. The leaves are bipinnately compound. The pinnae are alternate, fan-shaped or triangular, and truncate at the tip. The leaf sheaths have ridges on the dorsal side and palmate margins. The flowers are unisexual and monoecious. The spadix is usually simply branched, has many branches, and droops, and each inflorescence is spike-like and cauda-like. The fruit is cherry-sized and purple when ripened, containing 1 to 3 seeds. The seeds are slightly globose or compressed, and the endosperm is ductile. Twelve species are found from India to the Malay Peninsula, as well as the Solomon Islands and northeastern Australia. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
ヤシ科の中高木で,幹は単生または束生する。葉は2回羽状複葉。羽片は互生し,扇形または三角形で先端は切頭歯状。葉鞘(ようしよう)は背面に稜があり,ふちにはしゅろ毛がある。花は単性,雌雄同株。肉穂花序は通常,単一分岐で多く分岐し,下垂し,一つ一つの花序は穂状で馬尾状。果実はサクランボ大で紫色に熟し,なかに1~3個の種子を有する。種子はやや球形または扁圧され,胚乳は錯道状。インドからマレー半島,さらにソロモン群島やオーストラリア北東部に12種を産する。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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