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

References

  • 1996. database, The PLANTS Database
  • 2000. database, The PLANTS Database
  • 2011. Lamiales of North America Update
  • Academy of natural sciences of Philadelphia monographs 1: 250. 1935. (27 Nov 1935) (Acad. Nat. Sci. Philadelphia Monogr.)
  • Anonymous. 1986. List-Based Rec., Soil Conserv. Serv., U.S.D.A. Database of the U.S.D.A., Beltsville.
  • Hilty, J. Editor. 2014. Insect Visitors of Illinois Wildflowers.  World Wide Web electronic publication. illinoiswildflowers.info, version (09/2014) 
    See:   Abbreviations for Insect ActivitiesAbbreviations for Scientific ObserversReferences for behavioral observations
  • Orrell T. (custodian) (2013). ITIS Regional: The Integrated Taxonomic Information System (version Apr 2011). In: Species 2000 & ITIS Catalogue of Life, 11th March 2013 (Roskov Y., Kunze T., Paglinawan L., Orrell T., Nicolson D., Culham A., Bailly N., Kirk P., Bourgoin T., Baillargeon G., Hernandez F., De Wever A., eds). Digital resource at www.catalogueoflife.org/col/. Species 2000: Reading, UK.
  • Proceedings of the Academy of Natural Sciences of Philadelphia 73(3B): 490. 1921[1922]. (Proc. Acad. Nat. Sci. Philadelphia)
  • U. S. Fish and Wildlife Service. 1985. Endangered and Threatened Wildlife and Plants; Review of Plant Taxa for Listing as Endangered or Threatened Species. Federal Register, vol. 50, no. 188
  • U. S. Fish and Wildlife Service. 1985. Endangered and Threatened Wildlife and Plants; Review of Plant Taxa for Listing as Endangered or Threatened Species. Federal Register, vol. 50, no. 188. 39526-39584

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