Pa-chi-tien (Morindae Radix), commonly abbreviated as Pa-chi (巴吉), has been widely used for millennia as a type of traditional Chinese medicine. The traditional usage indicates that it could warm kidney, supplementing male potency, and strengthen muscles and bones. The root of Modinda officinalis How (巴戟天) (Rubiaceae) is adopted as the authentic origin of Morindae Radix. In order to clarify the botanical origins of the marketed raw materials in Taiwan, we collected three samples with similar appearances including the root of Morinda unbellta L. (羊角藤), Damnacanthus indicusc L. (恩施巴戟), and Damnacanthus officinarim Hiang (四川虎刺) as the reference specimens. Thirty samples were compared to the Pa-chi-tien and the above reference specimens bypharmacognosy study and chemical identification. In this investigation, all the sampleswere identified as Modinda officinalis How (巴戟天).