Are both Promenaea and Machaeranthera from North America?
Machaeranthera Machaeranthera is a genus of North American flowering plants in the daisy family which are known by the common name tansyaster.
Platanthera hookeri Platanthera hookeri, otherwise known as Hooker's orchid or Hooker's bog orchid, is a perennial wildflower in the genus "Platanthera" that can be found in temperate regions of North America ranging from Iowa to Newfoundland.