APPENDIX – List of British Orchid Species
| Scientific Name | English name | Welsh name |
| Cypripedium calceolus | Lady’s-slipper Orchid | Esgid Fair |
| Cephalanthera rubra | Red Helleborine | Caldrist Coch |
| C. longifolia | Narrow-leaved Helleborine | Caldrist Culddail |
| C. damasonium | White Helleborine | Caldrist Gwyn |
| Neottia cordata | Lesser Twayblade | Ceineirian Bach |
| N. ovata | Common Twayblade | Ceineirian |
| N. nidus-avis | Bird’s-nest Orchid | Tegeirian Nyth Aderyn |
| Epipactis palustris | Marsh Helleborine | Caldrist y Gors |
| E. atrorubens | Dark-red Helleborine | Caldrist Rhuddgoch |
| E. helleborine | Broad-leaved Helleborine | Caldrist Llydanddail |
| E. pupurata | Violet Helleborine | Caldrist Porffor |
| E. leptochila | Narrow-lipped Helleborine | Caldrist Gwefus-gul |
| E. dunensis | Dune Helleborine | |
| E. phyllanthes | Green-flowered Helleborine | Caldrist Melynwyrdd |
| E. sancta | Lindisfarne Helleborine | |
| Epipogium aphyllum | Ghost Orchid | Tegeirian y Cysgod |
| Liparis loeselii | Fen Orchid | Gefell-lys y Fignen |
| Hammarbya paludosa | Bog Orchid | Gefell-lys y Gors |
| Corallorhiza trifida | Coralroot Orchid | Tegeirian Gwreiddgwrel |
| Goodyera repens | Creeping Lady’s-tresses | Troellog y Pîn |
| Spiranthes romanzoffiana | Irish Lady’s-tresses | Troellog Gwyddelig |
| S. spiralis | Autumn Lady’s-tresses | Caineirian Troellog |
| S. aestivalis | Summer Lady’s-tresses | Troellog yr Haf |
| Herminium monorchis | Musk Orchid | Tegeirian Mwsg |
| Orchis anthropophora | Man Orchid | Tegeiran Gŵr |
| O. simian | Monkey Orchid | Tegeirian Epa |
| O. militaris | Military Orchid | Tegeirian Milwrol |
| O. pupurea | Lady Orchid | Tegeirian Gwraig |
| O. mascula | Early Purple Orchid | Tegeirian Coch |
| Pseudorchis albida | Small White Orchid | Tegeirian Broga Gwyn |
| Platanthera bifolia | Lesser Butterfly-orchid | Tegeirian Llydanwyrdd Bach |
| P. chlorantha | Greater Butterfly-orchid | Tegeirian Llydanwyrdd |
| Gymnadenia conopsea | Chalk Fragrant-orchid | Tegeirian Pêr |
| G. borealis | Heath Fragrant-orchid | Tegeirian Pêr y Rhos |
| G. densiflora | Marsh Fragrant-orchid | Tegeirian Pêr y Gors |
| Dactylorhiza incarnata | Early Marsh-orchid | Tegeirian Rhuddgoch |
| D. viridis | Frog Orchid | Llys Ysgyfarnog |
| D. fuchsia | Common Spotted-orchid | Tegeirian Mannog |
| D. maculate | Heath Spotted-orchid | Tegeirian Brych |
| D. praetermissa | Southern Marsh-orchid | Tegeirian y Gors |
| D. traunsteinerioides | Narrow-leaved Marsh-orchid | Tegeirian Rhuddgoch Culddail |
| D. ebudensis | Hebridean Marsh-orchid | |
| D. purpurella | Northern Marsh-orchid | Tegeirian y Fign |
| D. occidentalis | Irish Marsh-orchid | |
| Neotinea maculata | Dense-flowered Orchid | |
| N. ustulata | Burnt Orchid | Cordegeirian |
| Himantoglossum hircinum | Lizard Orchid | Tegeirian Drewllyd |
| Anacamptis laxiflora | Jersey Orchid | Tegeirian Llacflodyn |
| A. pyramidalis | Pyramidal Orchid | Tegeirian Bera |
| A. morio | Green-winged Orchid | Tegeirian y Waun |
| Ophrys insectifera | Fly Orchid | Tegeirian Pryfyn |
| O. apifera | Bee Orchid | Tegeirian y Gwenyn |
| O. fuciflora | Late Spider Orchid | Tegeirian Corryn Hwyr |
| O. sphegodes | Early Spider Orchid | Tegeirian Corryn Cynnar |