Platanthera dilatata (Pursh) Lindl. ex L.C. Beck Platanthera dilatata (Pursh) Lindl. ex L.C. Beck, Bot. North. Middle States: 347. 1833 sec. Romero-González & al. 2003≡Orchis dilatata Pursh, Fl. Amer. Sept. (Pursh) 2: 588. 1813 syn. sec. Romero-González & al. 2003