Leaf thickness, especially cutin layer thickness and sponge tissue thickness, are three important anatomic indexes of drought resistance.

• 依据叶解剖性状结构指标，并结合盆栽试验旱害观测，供试树种的抗旱性大小为：阔瓣含笑>深山含笑>金叶含笑>乐昌含笑。