What is "dimerocostus"

Dimerocostus is a group of plants in the Costaceae described as a genus in 1891. It is native to Central and South America.

1. Dimerocostus argenteus (Ruiz & Pav.) Maas - Peru, Bolivia
2. Dimerocostus cryptocalyx N.R.Salinas & Betancur - Colombia
3. Dimerocostus strobilaceus Kuntze - Honduras, Nicaragua, Costa Rica, Panama, Colombia, Venezuela (including Venezuelan Antilles), Guyana, Suriname, Ecuador, Peru, Bolivia