The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.

References

• Annotated Checklist of the Flowering Plants of Nepal @ eFloras.org
• Anonymous. 1986. List-Based Rec., Soil Conserv. Serv., U.S.D.A. Database of the U.S.D.A., Beltsville.
• Averyanov, L. V., Averyanova E. L., & Lavrenko A. N. (1982). Karyosystematic study of orchids (Orchidaceae) on the territory of the Komi ASSR. Bot. Zhurn.. 67,
• D'Emerico, S., Grünanger P., Scrugli A., & Pignone D. (1999). Karyomorphological parameters and C-band distribution suggest phyletic relationships within the subtribe Limodorinae (Orchidaceae). Plant Systematics and Evolution. 217,
• Dodson, C. H. 1992. Checklist of the Orchids of the Western Hemisphere. ??? pp.
• Ehlers, B. K., Olesen J. M., & Ågren J. (2002). Floral morphology and reproductive success in the orchid Epipactis helleborine: regional and local across-habitat variation. Plant Systematics and Evolution. 236,
• Fernald, M. 1950. Manual (ed. 8) i–lxiv, 1–1632. American Book Co., New York.
• Flora of China Editorial Committee. 2009. Fl. China 25: 1–570. Science Press & Missouri Botanical Garden Press, Beijing & St. Louis.
• Flora of North America @ eFloras.org
• Flora of North America Editorial Committee, e. 2002. Magnoliophyta: Liliidae: Liliales and Orchidales. 26: i–xxvi, 1–723. In Fl. N. Amer. Oxford University Press, New York.
• Flora of Pakistan @ eFloras.org
• Gleason, H. A. & A. Cronquist. 1991. Man. Vasc. Pl. N.E. U.S. (ed. 2) i–lxxv, 1–910. New York Botanical Garden, Bronx.
• Hickman, J. C. 1993. Jepson Man.: Higher Pl. Calif. i–xvii, 1–1400. University of California Press, Berkeley.
• Hilty, J. Editor. 2010. Insect Visitors of Illinois Wildflowers. World Wide Web electronic publication. flowervisitors.info, version (09/2010).
  See: Abbreviations for Insect Activities, Abbreviations for Scientific Observers, References for behavioral observations
• Malakhova, L. A., & Markova G. A. (1994). Chromosome numbers in the flowering plants of Tomsk region. Monocotyledones. Botaničeskij Žurnal (Moscow & Leningrad). 79,
• Munz, P. A. 1968. Suppl. Calif. Fl. 1–224. University of California Press, Berkeley.
• Nasir, E. & S. I. Ali (eds). 1980-2005. Fl. Pakistan Univ. of Karachi, Karachi.
• Scoggan, H. J. 1978 [1979]. Pteridophyta, Gymnospermae, Monocotyledoneae. 2: 93–545. In Fl. Canada. National Museums of Canada, Ottawa.
• Stepanov, N. V., & Muratova E. N. (1992). Chromosome numbers in some species of higher plants of flora of the Krasnoyarsk region. Botaničeskij Žurnal (Moscow & Leningrad). 77,
• Vij, S. P., Vaidya N., & Kondo K. (1995). Chromosomes and their bearing on species diversification in Epipactis (Orchidaceae). La Kromosomo. 77,
• Voss, E. G. 1972. Gymnosperms and Monocots. i–xv, 1–488. In Michigan Fl. Cranbrook Institute of Science, Bloomfield Hills, Michigan.