别名：巨桉;

科名：桃金娘科 Myrtaceae

属名：桉属 Eucalyptus

《中国植物志》第53(1)卷039页
  5.大桉
  Eucalyptus grandis Hill ex Maiden Forest. Fl. N. S. Wales 1: 79. 1903; Penfold & Willis The Eucalypts 352. 1961.
  大乔木；树皮平滑，银白色，逐年脱落；嫩枝有棱，灰白色。幼态叶片薄革质，阔披针形至卵形，有短柄；成熟叶片披针形，长13-20厘米，宽2-3.5厘米，上面深绿色，稍发亮，两面有细腺点，侧脉与中脉成60度-70度交角；叶柄长约2厘米。伞形花序腋生，有花3-10朵，总梗压扁，长1-1.5厘米；花蕾狭倒卵形，长8-10毫米，宽5毫米，无梗或有短梗；帽状体半圆形，先端有1短尖头，约与萼管等长或略短；雄蕊长8-10毫米，花药长圆药，纵裂，背面有腺体，近基部着生；花柱比雄蕊短。蒴果梨形至锥形，无柄或有短柄，长7-8毫米，宽6-8毫米，灰色，果缘内藏，果瓣4-5，有时6，稍突出。
  原产澳大利亚东南部沿海地区，喜生于湿润而肥沃的河谷壤土及由玄武岩风化的红壤，在适宜的条件下生长迅速，树高50米，胸径1.6米。
  广西于1964年引入，10年间树高15米，胸径25厘米，已开花结果；广东雷州林场亦于1973年开始栽种，估计在那里的玄武岩风化的红壤能适合它的生长。木材灰红色，稍轻，直纹，易裂。这个种和柳叶桉E. saligna Smith很近似，只是叶片稍发亮，蒴果较长。

《Flora of China》 Vol. 13 (2007)
Eucalyptus grandis  W. Hill ex Maiden
大桉   da an
Trees, large. Bark at base of trunk rough and flaky, apically silvery white, smooth, and gradually exfoliating. Branchlets grayish white, ridged. Young leaves shortly petiolate; leaf blade broadly lanceolate to ovate, thinly leathery. Mature leaves with a ca. 2 cm petiole; leaf blade lanceolate, 13-20 × 2-2.5 cm, both surfaces with small glands, adaxially dark green and slightly glossy, secondary veins at an angle of 60°-70° from midvein. Inflorescences axillary, simple, umbels 3-10-flowered; peduncle 1-1.5 cm, compressed. Flower buds narrowly obovate, 8-10 × ca. 5 mm. Hypanthium obconic to campanulate; stipe 0-3 mm; calyptra semiglobose to conic, as long or slightly shorter than hypanthium, apex acute to apiculate. Stamens 8-10 mm; anthers oblong, nearly basifixed, dehiscing longitudinally, glands abaxial. Style shorter than stamens. Capsule gray, pyriform to awl-shaped, 7-8 × 6-8 mm; disk narrow; valves 4 or 5(or 6), exserted from hypanthium. Fl. winter-spring.
Cultivated in Guangdong, Guangxi, and Taiwan [native to E and NE Australia].