Gymnadenia conopsea (L.) R.Br.
| XXVII.—Flora of Central Norfolk S P Woodward (1841) Annals And Magazine of Natural History 7: 201-206 | |
| LIV.—Botanical excursion in Lower Styria in 1842 R C Alexander (1846) Annals And Magazine of Natural History 17: 457-466 | |
| XV.—On the impregnation in orchids as a proof of the two different effects of the pollen F Hildebrand (1863) Annals And Magazine of Natural History 12: 169-174 | |
| XVI.—Notes on the fertilization of orchids Charles Darwin (1869) Annals And Magazine of Natural History 4: 141-159 | |
| Beobachtungen über Vorkommen und Lebensweise verschiedener, besonders Gebirge und Alpen bewohnender Schmetterlings-Arten. (Anm.: 1. Teil) Gabriel Höfner (1883) Wiener Entomologische Zeitung 2: 189-194 | |
| Orchids collected by J. F. Rock on the Arnold Arboretum expedition to northwestern China and northeastern Tibet C Schweinfurth (1929) Journal of the Arnold Arboretum 10: 169-174 |