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Thrinax radiata
''Thrinax radiata'' is a medium to slow growing palm in the family Arecaceae,〔(【引用サイトリンク】url=http://plants.usda.gov/core/profile?symbol=THRA2 )〕 that is indigenous to many caribbean islands and some surrounding areas of the North American mainland (Florida only) as well as Central America. On average this species reaches a height of 20 feet with large compoundly segmented leaves which are 4 to 5 feet wide and 2.5 feet long. Like all palms, this species grows thick and low to the ground before sending its meristem vertical, gaining the form of a slender tree.
== Description ==
This species has no crownshaft and the canopy appears to emerge directly from the trunk. The leaves are palmate and divide into segments about halfway down their length with the leaf emerging from the petiole in what is described as a pointed hastula shape. The entire canopy consists of between 10 and 20 large leaves and on average gains only 6 inches of height per year. This palm does best in full sun but can tolerate moderate amounts of shade. The shape of the canopy will vary depending on its amount of insolation with full sun specimens appearing more globular or compact and shaded specimens having a longer, more spread out, canopy. The inflorescences of this species can begin developing when the tree is only 6 feet tall, exceed 3 feet in length, arch downwards, and can extend below the frond. The flowers are bisexual and occur year round, with peak production in the spring. The flowers and resulting infructescences, called drupes, are white and like the flowers can be seen year round. For many years there was debate over the phylogenetic classification of this species. It has been distinguished and separated from the genus Cocothrinax by its white drupes whereas Cocothrinax species have Black or yellow drupes. Another distinguishing characteristic of Thrinax are split leaf bases while the latter is distinguished by an entire, or fused, leaf base.〔
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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