Berchemia is a genus of plants in the family Rhamnaceae, named after Dutch botanist Berthout van Berchem.
 They are climbing plants or small to medium-sized trees that occur in Africa, Asia and the Americas.
Howea is a genus of two palms, "H. belmoreana" and "H. forsteriana", both endemic to Lord Howe Island, Australia.
 "H. forsteriana" in particular is commonly grown as an indoor plant in the Northern Hemisphere, and the two species form the mainstay of the island's palm seed industry and more importantly its trade in newly germinated seedlings.
 The palms are also cultivated on Norfolk Island, where seeds are produced for export.

Question: Are Berchemia and Howea both genus of plants?
Answer: yes