Mahonia oiwakensis
 Mahonia oiwakensis is a species of plant in the Berberidaceae family. It is native to China (Taiwan Guizhou Hong Kong Sichuan Taiwan Xizang (Tibet) and Yunnan). It has been found at elevations up to 3800 m.Mahonia oiwakensis is a shrub or tree up to 7 m tall. Leaves are up to 45 cm long compound with 12-20 pairs of leaflets plus a larger terminal one dark green above yellow-green below. Inflorescence is a fascicled raceme up to 25 cm long.