| platanthera | (n) herbaceous terrestrial orchids of temperate northern and southern hemispheres, Syn. genus Platanthera |
| greater butterfly orchid | (n) south European orchid with dark green flowers that are larger and less fragrant than Platanthera bifolia; sometimes placed in genus Habenaria, Syn. Habenaria chlorantha, Platanthera chlorantha |
| lesser butterfly orchid | (n) south European orchid having fragrant greenish-white flowers; sometimes placed in genus Habenaria, Syn. Habenaria bifolia, Platanthera bifolia |
| prairie white-fringed orchid | (n) of central North America; a threatened species, Syn. Platanthera leucophea |