Are Costus and Boenninghausenia plants both found in the Americas?
Costus:  It is widespread through tropical and subtropical regions of Asia, Africa, and the Americas. Boenninghausenia: Boenninghausenia is a monotypic plant genus in the family Rutaceae. Boenninghausenia:  The sole species is Boenninghausenia albiflora, which occurs in Bhutan, Nepal, Pakistan, Kashmir, India, Indonesia, Philippines, Myanmar, Thailand, Laos, North Vietnam, China and Japan.
i don't know