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异叶南洋杉Araucaria heterophylla

时间:2013-12-04 17:45作者:徐晔春 点击: 次 标签: Araucariaceae 南洋杉科 南洋杉属 Araucaria
  





中文名(Chinese Name):异叶南洋杉
学名(Scientific Name):Araucaria heterophylla (Salisb.) Franco
英文名(English Common Name):
别名(Chinese Common Name):钻叶杉
异名(Synonym):Eutassa heterophylla Salisb.;Abies columbaria Desf.;Pinus columbaria Dum. Cours.;Araucaria excelsa var. glauca Carrière;Eutacta excelsa var. aurea-variegata Carrière;Eutacta excelsa var. glauca (Carrière) Carrière;Eutacta excelsa var. monstrosa Carrière;Eutacta excelsa var. variegata-alba Carrière  
科属(Family & Genus):南洋杉科(Araucariaceae)南洋杉属(Araucaria
形态特征(Description):乔木,在原产地高达50米以上,胸径达1.5米;树干通直,树皮暗灰色,裂成薄片状脱落;树冠塔形,大枝平伸,长达15米以上;小枝平展或下垂,侧枝常成羽状排列,下垂。叶二型:幼树及侧生小枝的叶排列疏松,开展,钻形,光绿色,向上弯曲,通常两侧扁,具3-4棱,长6-12毫米,上面具多数气孔线,有白粉,下面气孔线较少或几无气孔线;大树及花果枝上的叶排列较密,微开展,宽卵形或三角状卵形,多少弯曲,长5-9毫米,基部宽,先端钝圆,中脉隆起或不明显,上面有多条气孔线,有白粉,下面有疏生的气孔线。雄球花单生枝顶,圆柱形。球果近圆球形或椭圆状球形,通常长8-12厘米,径7-11厘米,有时径大于长;苞鳞厚,上部肥厚,边缘具锐脊,先端具扁平的三角状尖头,尖头向上弯曲;种子椭圆形,稍扁,两侧具结合生长的宽翅。
分布(Distribution):原产大洋洲诺和克岛。
用途(Use):我国福州、广州等地引种栽培,作庭园树用。上海、南京、西安、北京等地为盆栽,冬季须置于温室越冬。
引自中国植物志英文版FOC Vol. 4
 Araucaria heterophylla (Salisbury) Franco, Anais Inst. Super. Agron. 19: 11. 1952.
异叶南洋杉 yi ye nan yang shan | Araucariaceae  | Araucaria
Eutassa heterophylla Salisbury, Trans. Linn. Soc. London 8: 316. 1807.
Trees to 50 m tall; trunk to 1.5 m d.b.h.; trunk straight; bark dark gray, flaking; crown tower-shaped; branchlets spreading horizontally or drooping; lateral branchlets usually pinnately arranged, drooping. Leaves dimorphic: those of young trees and lateral branchlets loosely arranged, spreading openly, bright green, glaucous abaxially, subulate, usually laterally depressed, upcurved, 6-12 mm, 3- or 4-ridged; those of mature trees and cone-bearing branchlets densely arranged, slightly openly spreading, broadly ovate or triangular-ovate, ± curved, 5-9 mm, widest at base, midvein obviously raised or not, apex obtuse. Pollen cones terminal, solitary. Seed cones subglobose, 8-12 × 7-11 cm, sometimes wider than long; apex of bracts triangular, flattened, acute, upcurved. Seeds ellipsoid, slightly flattened, with a lateral wing.
Cultivated. Fujian (Fuzhou Shi), Guangdong (Guangzhou Shi), S Yunnan (Jinghong Xian, Mengla Xian) [native to Australia (Norfolk Island)].
顶一下
(8)
57.1%
踩一下
(6)
42.9%
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