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Lagarostrobos franklinii : ウィキペディア英語版
Lagarostrobos

''Lagarostrobos franklinii'' is a species of conifer native to the wet southwestern corner of Tasmania, Australia. It is often known as the Huon pine or Macquarie pine, although it is actually a podocarp (Podocarpaceae), not a true pine (Pinaceae). It is the sole species in the genus ''Lagarostrobos''; one other species ''L. colensoi'' formerly included has been transferred to a new genus ''Manoao''. The genus was also formerly included in a broader circumscription of the genus ''Dacrydium''.
The wood is highly prized for its golden yellow colour, fine grain, and natural oils that resist rotting. The chemical giving the timber its unique smell and preservative qualities is methyl eugenol.
It has been planted in the grounds of Crathes Castle, Aberdeenshire, and has done well. Two healthy specimens can also be found at Torosay Castle, Isle of Mull.〔(【引用サイトリンク】title=''Half-hardy trees in Britain and Ireland - part two'' )
==Description==

It is a slow-growing, but long-lived tree; some living specimens of this tree are in excess of 2000 years old.〔(【引用サイトリンク】title=Plants - Huon pine : one of the oldest plants on earth )〕 It grows to 10 to 20 m tall, exceptionally reaching 30 m, with arching branches and pendulous branchlets. The leaves are spirally arranged, very small and scale-like, 1 to 3 mm long, covering the shoots completely. It is dioecious, with male (pollen) and female (seed) cones on separate plants. The male cones are yellow, 5 to 8 mm long and 1 to 2 mm broad. The mature seed cones are highly modified, berry-like, with 5 to 10 lax, open scales which mature in 6–8 months, with one seed 2 to 2.5 mm long on each scale. Unlike the closely related New Zealand genus ''Manoao'', the scales do not become fleshy and are water-dispersed, not bird-dispersed.〔
A stand of trees reputed to be in excess of 10,500 years old was recently found in western Tasmania on Mount Read. Each of the trees in this stand is a genetically identical male that has reproduced vegetatively. Although no single tree in this stand is of that age, the stand itself as a single organism has existed that long.〔(【引用サイトリンク】title=Could a tree be 10,000 years old? )
Based on herbarium specimens the extent of occurrence is estimated to be around 13,363 km2 with an estimated area of occupancy of 825 km2. The actual area of occupancy is estimated to range from 2,500 ha (Gibson 1991) to as much as 10,500 ha (Parks and Wildlife Service Tasmania 2006).〔http://www.iucnredlist.org/details/34153/0〕

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「Lagarostrobos」の詳細全文を読む



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