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Manicaria saccifera : ウィキペディア英語版
Manicaria

''Manicaria''is a palm genus which is found in Trinidad, Central and South America. It contains two recognized species:〔(Kew World Checklist of Selected Plant Families )〕
#''Manicaria martiana'' Burret - Colombia, northwestern Brazil
#''Manicaria saccifera'' Gaertn. - Central America, Trinidad, Venezuela, Colombia, Ecuador, Peru, northwestern Brazil
It has one of the largest known leaves in the plant kingdom (up to 8 metres in length).
''Manicaria'' thrives in swamps or estuarine areas where river meets ocean. In the Tortuguero region of Costa Rica, where ''Manicaria saccifera'' is plentiful, local people know this palm as "Palma Real", or "Royal Palm". Its heavy, large leaves are valued over other palm species as the best material for roof thatching.
''Manicaria saccifera'' is an obligate swamp species, and as most other palms, it thrives in the wet, humid conditions of tropical lowland forests. Myers (1981) states "In the humid environments of the neo-tropics there is an increase in the abundance of understory palms" (24). Further to this, lowland forests generally have a higher density of palms than upland forests, and palms thrive better in poorly drained, wet soils than dry or well-drained soils. This particular palm can often be found mixed with Raphia palms in swamps and depressions.
== Description ==
'
'Manicaria saccifera'' is easy to identify by the enormous, broad leaves and clusters of spiked fruit pods visible at the base of the fronds. The leaves grow in a pinnate shape, and resemble large feathers with irregular separation and serrated edges. They are stiff, tough leaves, and can actually give a sharp “paper cut” if the hand is brushed against them.
The fruits grow in large clusters throughout the year, forming in shells that contain two or three seeds each. The pods fall from the tree and form mounds at the base. Eventually the spiked outer shell of the pod breaks away, revealing the smooth round seed underneath. Some mammals, such as peccaries, eat the white flesh found inside seeds that have fallen and emerged from the tough outer shell, but human consumption of this fruit is not common (Myers, 1981). Since the seeds can float for extended periods of time, water is the main seed distribution method for the ''Manicaria''. Seed dispersal by animals is not effective; Myers (1981) found that seeds which were partially consumed or damaged by animals were not likely to germinate (See Fig. 1). Where mammal activity is high, seed and seedling predation are also very high, so the ''Manicaria'' tends to thrive only in swampy regions that are less frequented by mammals.

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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