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

References

  • Anonymous. 1986. List-Based Rec., Soil Conserv. Serv., U.S.D.A. Database of the U.S.D.A., Beltsville.
  • Czerepanov, S. K. 1981. Sosud. Rast. SSSR 509 pages. Nauka, Leningradskoe Otd-nie, Leningrad.
  • Fernald, M. 1950. Manual (ed. 8) i–lxiv, 1–1632. American Book Co., New York.
  • Flora of North America Editorial Committee, e. 1993. Pteridophytes and Gymnosperms. 2: i–xvi, 1–475. In Fl. N. Amer. Oxford University Press, New York.
  • Gleason, H. A. & A. Cronquist. 1968. The Pteridophytoa, Gymnospermae and Monocotyledoneae. 1: 1–482. In H. A. Gleason Ill. Fl. N. U.S. (ed. 3). New York Botanical Garden, New York.
  • Scoggan, H. J. 1978 [1979]. Pteridophyta, Gymnospermae, Monocotyledoneae. 2: 93–545. In Fl. Canada. National Museums of Canada, Ottawa.
  • Type collection: Gilbert, B. D. 1901. List N. Amer. Pterid. 8: 27.

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