泰国发现一种新品种龙血树
文章来源:未知 文章作者:enread 发布时间:2013-10-19 06:15 字体: [ ]  进入论坛
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The newly discovered dragon tree species Dracaena kaweesakii from Thailand is characterized by its extensive branching. The new species reaches an impressive 12m in both height and crown diameter, and has beautiful soft sword-shaped leaves with white edges and cream flowers with bright orange filaments1(花丝,细丝), all highly distinctive2 features. The study describing this exciting new species was published in the open access journal Phytokeys by an international team of scientists.
 
Dracaena kaweesakii is a relative of the beautiful Canary Island dragon tree Dracaena draco. It is an ecologically important species found only on limestone3(石灰岩) hills and mountains that are often associated with Buddhist4 temples in Thailand.
 
Dracaena kaweesakii is extracted from the wild for use in horticulture in Thailand and is one of the more popular species due to its extensive branching. Dracaena species in general are thought by Thai people to bring luck to households that have them, hence their popularity. A number of populations of D. kaweesakii are protected by proximity5 to temples or having been transplanted into their gardens. There is no direct evidence yet of over-extraction but sustainability studies are needed at population level to insure the protection of this beautiful species.
 
"Dracaena kaweesakii is thought to be endangered through having a limited distribution, destruction of limestone for concrete and extraction of trees for gardens," comments Dr Wilkin about the conservation status of the new dragon tree species.


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1 filaments 82be78199276cbe86e0e8b6c084015b6     
n.(电灯泡的)灯丝( filament的名词复数 );丝极;细丝;丝状物
参考例句:
  • Instead, sarcomere shortening occurs when the thin filaments'slide\" by the thick filaments. 此外,肌节的缩短发生于细肌丝沿粗肌丝“滑行”之际。 来自辞典例句
  • Wetting-force data on filaments of any diameter and shape can easily obtained. 各种直径和形状的长丝的润湿力数据是易于测量的。 来自辞典例句
2 distinctive Es5xr     
adj.特别的,有特色的,与众不同的
参考例句:
  • She has a very distinctive way of walking.她走路的样子与别人很不相同。
  • This bird has several distinctive features.这个鸟具有几种突出的特征。
3 limestone w3XyJ     
n.石灰石
参考例句:
  • Limestone is often used in building construction.石灰岩常用于建筑。
  • Cement is made from limestone.水泥是由石灰石制成的。
4 Buddhist USLy6     
adj./n.佛教的,佛教徒
参考例句:
  • The old lady fell down in adoration before Buddhist images.那老太太在佛像面前顶礼膜拜。
  • In the eye of the Buddhist,every worldly affair is vain.在佛教徒的眼里,人世上一切事情都是空的。
5 proximity 5RsxM     
n.接近,邻近
参考例句:
  • Marriages in proximity of blood are forbidden by the law.法律规定禁止近亲结婚。
  • Their house is in close proximity to ours.他们的房子很接近我们的。
TAG标签: tree species Thailand
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