Rhiza (from 'root') is a genus of moths of the family Noctuidae. The genus was described by Staudinger in 1889.
Subgenus Rhiza
Subgenus Gryphadena <small>Kusnezov, 1908</small>
Subgenus Graphantha <small>Ronkay, Varga & Fábián, 1995</small>