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


  • Ames, O. & D. S. Correll. 1952. Orchids of Guatemala. Fieldiana, Bot. 26(1): i–xiii, 1–395.
  • Anonymous. 1986. List-Based Rec., Soil Conserv. Serv., U.S.D.A. Database of the U.S.D.A., Beltsville.
  • Boston Journal of Natural History 5(2): 236. 1845. (Boston J. Nat. Hist.)
  • Breedlove, D.E. 1986. Flora de Chiapas. Listados Floríst. México 4: i–v, 1–246.
  • CONABIO. 2009. Catálogo taxonómico de especies de México. 1. In Capital Nat. México. CONABIO, Mexico City.
  • Correll, D. S. & M. C. Johnston. 1970. Man. Vasc. Pl. Texas i–xv, 1–1881. The University of Texas at Dallas, Richardson.
  • Encyclopédie Méthodique, Botanique 4: 567. 1789. (Encycl.)
  • Engelm. & A.Gray. 1845. In: Boston J. Nat. Hist. 5: 236
  • Fernald, M. 1950. Manual (ed. 8) i–lxiv, 1–1632. American Book Co., New York.
  • Flora Boreali-Americana 2: 157. 1803. (Fl. Bor.-Amer.)
  • Gleason, H. A. & A.J. Cronquist. 1991. Man. Vasc. Pl. N.E. U.S. (ed. 2) i–910. New York Botanical Garden, Bronx.
  • Govaerts R. (ed). For a full list of reviewers see: (2015). WCSP: World Checklist of Selected Plant Families (version Sep 2014). In: Species 2000 & ITIS Catalogue of Life, 26th August 2015 (Roskov Y., Abucay L., Orrell T., Nicolson D., Kunze T., Flann C., Bailly N., Kirk P., Bourgoin T., DeWalt R.E., Decock W., De Wever A., eds). Digital resource at Species 2000: Naturalis, Leiden, the Netherlands. ISSN 2405-8858.
  • Great Plains Flora Association. 1986. Fl. Great Plains i–vii, 1–1392. University Press of Kansas, Lawrence.
  • Hilty, J. Editor. 2015. Insect Visitors of Illinois Wildflowers.  World Wide Web electronic publication., version (09/2015) 
    See:   Abbreviations for Insect ActivitiesAbbreviations for Scientific ObserversReferences for behavioral observations
  • Long, R. W. & O. K. Lakela. 1971. Fl. Trop. Florida i–xvii, 1–962. University of Miami Press, Coral Cables.
  • Radford, A. E., H. E. Ahles & C. R. Bell. 1968. Man. Vasc. Fl. Carolinas i–lxi, 1–1183. University of North Carolina Press, Chapel Hill.
  • Revisio Generum Plantarum 2: 664. 1891. (5 Nov 1891) (Revis. Gen. Pl.)
  • Thornhill, Robert, Krings, Alexander, Lindbo, David, Stucky, Jon (2014): Guide to the Vascular Flora of the Savannas and Flatwoods of Shaken Creek Preserve and Vicinity (Pender & Onslow Counties, North Carolina, U. S. A.). Biodiversity Data Journal 2, 1099: 1099-1099, URL:
  • Type collection: Small, J. K. 1898. Bull. Torrey Bot. Club. 25: 610.
  • WoRMS (2015). Spiranthes vernalis. Accessed through: World Register of Marine Species at
  • Wunderlin, R. P. 1998. Guide Vasc. Pl. Florida i–x, 1–806. University Press of Florida, Gainesville.


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