Are both Promenaea and Machaeranthera from North America?
Promenaea Promenaea is a genus of flowering plants from the orchid family, Orchidaceae. It contains 18 currently accepted species (including one that is apparently extinct), all endemic to Brazil.
Aristaea machaerophora Aristaea machaerophora is a moth of the Gracillariidae family. It is known from Queensland, Australia.