Phellodendron chinense is a plant species in the genus Phellodendron. The isocoumarin derivative 3-acetyl-3,4-dihydro-5,6-dimethoxy-1H-2-benzopyran-1-one can be found in Huáng bǎi (P. chinense), one of the fifty fundamental herbs of traditional Chinese medicine. Phellodendron chinense, Trees to 15 m tall. Leaves 7-15-foliolate; rachis glabrous, thinly pubescent, or rust-colored tomentose; leaflet blades ovate-elliptic to oblong-lanceolate, 8-15 × 3.5-6 cm, papery, base cuneate to attenuate and oblique, apex mucronate to acuminate. Inflorescences and infructescence ± compact, rachis, branches, and pedicels robust. Fruit subglobose to ellipsoid, 1-1.5 cm in diam. Seeds 6-7 × 3-5 mm. Fl. May-Jun, fr. Sep-Nov. Mixed broad-leaved forests, open to dense forests; 800-1500(-3000) m. Anhui, Fujian, Gansu, Guangdong, Guangxi, Guizhou, Henan, Hubei, Hunan, Jiangsu, Shaanxi, Sichuan, Yunnan, Zhejiang.