扁轴木属（学名：Parkinsonia）是云实科下的一个属，为乔木或灌木植物。该属共有约4种，分布于南美、非洲和大洋洲。

For the ammonite genus Parkinsonia, see Parkinsonia (ammonite)

Parkinsonia /ˌpɑːrkᵻnˈsoʊniə/, also Cercidium /sərˈsɪdiəm/, is a genus of flowering plants in the pea family, Fabaceae. It contains about 12 species that are native to semi-desert regions of Africa and the Americas. The name of the genus honors English apothecary and botanist John Parkinson (1567–1650).