👉 Hydrathrus is a genus of flowering plants in the family Araceae, native to Asia and Europe. It is a member of the genus Hydrastrellis, which also includes several other genera, including Hydrastum, Hydrastus, and Hydrastinae. The genus is commonly used as a name for the various species of hydrathrum, a type of flowering plant that has been cultivated for centuries in many parts of the world.