Oplopanax is a small genus of flowering plants in the family Araliaceae, consisting of three species of deciduous shrubs, native to western North America and northeastern Asia.
 "Oplopanax" is closely related to the Asian genus "Fatsia".
Rhodophiala is a genus of herbaceous, perennial and bulbous plants in the Amaryllis family (Amaryllidaceae, subfamily Amaryllidoideae).
 It consists of about 30 South American species distributed in southern Brazil, Argentina, and, specially, in Chile.
Fatsia is a small genus of three species of evergreen shrubs native to southern Japan and Taiwan.
 They typically have stout, sparsely branched stems bearing spirally-arranged, large leathery, palmately lobed leaves 20–50 cm in width, on a petiole up to 50 cm long, and small creamy-white flowers in dense terminal compound umbels in late autumn or early winter, followed by small black fruit.

Question: Are Rhodophiala and Fatsia both genus of plants ?
Answer: yes