|
''Korthalsia'' is a clustering genus of flowering plant in the palm family spread throughout Southeast Asia. It is a highly specialized rattan with some species known to have an intimate relationship with ants, hence the common name ant rattan.〔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〕 High-climbing and armed with spines, the genus is named for the Dutch botanist P. W. Korthals who first collected them from Indonesia. ==Description== In young plants the trunks, petioles and rachises are covered in spines. Mature plants typically lose rachis and petiole spines but will retain trunks spines in its new growth. The suckering stems are small to mostly moderate and are among the few in the palm family that branch; among rattans it is the only one with splitting stems. The trunks are bare at the bottom but retain persistent leaf bases in its youngest parts; enlarged paper-like appendages, ocreas, form where the petioles meet the stem. The ocreas are usually grossly swollen and house ants.〔 Younger leaves are undivided with the occasional bifid apice. A truly pinnate leaf form comes in maturity and is accompanied by a barbed rachis extension which allows the palm to hook onto forest vegetation and climb to the canopy top where mature pinnae hang pendent. Also unique to the group are the rachis borne stalks, adapted for climbing, from which the leaflets emerge. Sexually, they are hapaxanthic, another rare feature in palms, which results in the death of individual stems after flowering and fruiting has occurred. As hermaphrodites, the flowers are also uncommon with both male and female organs present in each. The inflorescence is short and thick, once or twice branched, with bisexual flowers hanging from long, furry stalks. Spherical to ovoid, the fruit is scaly and matures to orange, red or brown with one basally attached seed. Fossilized pollen referable to this genus has been recovered in upper Miocene deposits in northwest Borneo; its long history, and its wide variety of unusual features may indicate its climbing habit evolved independently of other rattans.〔 Bees are observed visitors to the flowers while ''Anthracoceros convexus'' feeds on the fruit.〔 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「Korthalsia」の詳細全文を読む スポンサード リンク
|