Nineteen orchid genera, including thirty-six taxa, are known to occur naturally in Louisiana: Calopogon, Cleistes, Corallorhiza, Cypripedium, Epidendrum, Erythrodes, Eulophia, Habenaria, Hexalectris, Isotria, Listera, Malaxis, Platanthera, Pogonia, Ponthieva, Spiranthes, Tipularia, Triphora, and Zeuxine.