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Metrosideros bartlettii
Bartlett's rātā (''Metrosideros bartlettii''), also known as Cape Reinga white rātā or in Māori as Rātā Moehau,〔(【引用サイトリンク】url=http://www.doc.govt.nz/parks-and-recreation/places-to-go/northland/places/te-paki-recreation-reserve/ )〕 is one of twelve ''Metrosideros'' species endemic to New Zealand and is notable for its extreme rarity and its white flowers, somewhat uncommon in that genus of red-flowered trees and plants. Its natural range is in the far north of the North Island at Te Paki, in three patches of dense native forest near Spirits Bay (34° S) that escaped destruction by fire, namely Radar Bush, Kohuronaki Bush, and Unuwhao Bush. Only 25 adult trees are known to exist in the wild (down from 34 in 1992)〔(【引用サイトリンク】website=http://www.nzpcn.org.nz/flora_details.aspx?ID=24 )〕 and most of these are either ill or dying. The lack of fossil evidence elsewhere suggests that the tree may always have been restricted to the North Cape area, which was an island until it was connected to the mainland by the sandspit that constitutes Ninety Mile Beach.
==Description==
''Metrosideros bartlettii'' was discovered by John Bartlett, a schoolteacher from Auckland, in 1975. He found an unusual tree growing in Radar Bush, 9.5 km south-east of Cape Reinga. Almost ten years passed before the flowers were collected, making possible a scientific description of the tree. Bartlett's rātā grows to a height of up to thirty metres, usually beginning life as a hemi-epiphyte on taraire (''Beilschmiedia tarairi''), pūriri (''Vitex lucens''), rewarewa (''Knightia excelsa'') or tree ferns (''Cyathea'' spp.). Occasionally, the tree is found growing on the ground on rock outcrops and rocky cliffs. The tree bears white flowers made up of a mass of stamens in November or December. Seed ripens in March or April. The trunk is up to 1.5 m in diameter. Bartlett's rātā resembles northern rātā (''Metrosideros robusta'') but can be distinguished by the small white flowers and by the leaves, which taper to a point at the tip, while those of northern rātā are notched at the tip. Also distinctive is the white or whitish-grey bark that peels easily into soft flakes, which it is thought may offer resistance to fire damage. This may have been a key factor in the tree's precarious survival in an area prone to forest fire.
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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