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Eugeissona
''Eugeissona'' is a clustering genus of flowering plant in the palm family native to Borneo, Thailand and Malaysia. The six monoecious species provide a wide range of local uses and are commonly called bertam or wild Bornean sago. The genus is the sole representative of the Eugeissoninae having very few obvious relatives; the hermaphrodite and staminate flowers are also found in ''Metroxylon'', however the other specialized characteristics are unique suggesting an early split and differentiation from other members of the Calameae.〔Uhl, Natalie W. and Dransfield, John (1987) ''Genera Palmarum - A classification of palms based on the work of Harold E. Moore''. Lawrence, Kansas: Allen Press. ISBN 0-935868-30-5 / ISBN 978-0-935868-30-2〕 Fossilized pollen belonging to these plants has been recovered in the lower and middle Miocene deposits in Sarawak.〔 The name is from two Greek words meaning "good" and "roof", due to their common use in roof thatching. ==Description== Half of the ''Eugeissona'' palms will form above-ground stems, while the remainder are trunkless. Those that are trunk-forming are supported by tall masses of stilt roots in which detritus and leaf matter collect, providing nesting to various biota. The large leaves are carried on long, spiny petioles, and the rachises and trunks are also spine-bearing. The erect inflorescence bears some of the largest flowers in the palm family, emerging within the leaf crown featuring both male and bisexual flowers. The fruit is a beaked, ovoid drupe carrying one seed.〔Riffle, Robert L. and Craft, Paul (2003) ''An Encyclopedia of Cultivated Palms''. Portland: Timber Press. ISBN 0-88192-558-6 / ISBN 978-0-88192-558-6〕
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「Eugeissona」の詳細全文を読む
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