楠木，又名楠树、桢楠，是樟科楠属和润楠属各树种的统称，有香楠、金丝楠、水楠等种类。属大乔木，成熟时可达30米，其木材坚硬，价格昂贵，多用于造船和宫殿。现存最大的楠木殿是明十三陵中长陵棱恩殿，殿内共有巨柱60根，均由整根金丝楠木制成。北京故宫也仅南薰殿楠木使用较多，已经没有完整的楠木殿了。

楠木极其珍贵，已经列入中国国家重点保护野生植物名录之中。

Phoebe zhennan is a large species of tree up to 30 metres (98 ft) tall in the Lauraceae family. Zhennan was originally a Chinese word that related to its Chinese name 楠 (Nan). It is endemic to China where it occurs in Guizhou, Hubei, and Sichuan provinces. It is threatened by habitat loss. The species is under second-class national protection in China. They were so valuable that only royal families could afford to use them. Especially when they are semi fossilized and become 乌木 (Wu Mu, "Black Wood"), the price on 2012 market could be as high as over $10,000 per cubic meter.