This study investigated anthraquinones in Morinda umbellata L. (Rubiaceae) from Hong Kong. The roots and stems were extracted with light petroleum and acetone, followed by extensive chromatography. Compounds were identified via direct comparison with authentic specimens using UV, IR, Rf values, and mixed melting points. From roots, 2-hydroxyanthraquinone, alizarin, alizarin 1-methyl ether, rubiadin, rubiadin 1-methyl ether, xanthopurpurin, alizarin 2-methyl ether, 1-hydroxy-2-methylanthraquinone, 2-methylanthraquinone, 2-methoxyanthraquinone, 1-methoxy-2-methylanthraquinone, munjistin, lucidin, and glycosides of rubiadin and rubiadin 1-methyl ether were isolated. From stems, 2-methylanthraquinone, 2-hydroxyanthraquinone, 2-methoxyanthraquinone, 1-hydroxy-2-methylanthraquinone, 1-methoxy-2-methylanthraquinone, alizarin, alizarin 1-methyl ether, alizarin 2-methyl ether, xanthopurpurin, rubiadin, and rubiadin 1-methyl ether were obtained. None of the compounds reported in previous studies (e.g., morindone, damnacanthal, soranjidiol, 1,3-dihydroxy-6-methylanthraquinone) were found in the examined sample.