References

For Spinulum

Haines, A.A. 2003a. The families Huperziaceae and Lycopodiaceae of New England: a taxonomic and ecological reference. V.F. Thomas Co., Bowdoin, ME. 100 pp. Google Scholar

Hickey, R.J. 1977. The Lycopodium obscurum complex in North America. Amer. Fern J. 67: 45-48. Google Scholar

Øllgaard. 1990. In Kramer, K.U., and P.S. Green. 1990. Pteridophytes and Gymnosperms. In K. Kubitzki, ed., The families and genera of vascular plants. Springer-Verlag, Berlin. Google Scholar

Wagner, W.H., and J.M. Beitel. 1993. Lycopodiaceae. In Flora of North America Editorial Committee. 1993b. Flora of North America north of Mexico. Volume 2, pteridophytes and gymnosperms. Oxford Univ. Press, New York, NY. 475 pp. Google Scholar

Wagner, W.H., J.M. Beitel, and R.C. Moran. 1989. Lycopodium hickeyi: a new species of North American clubmoss. Amer. Fern J. 79: 119-121. Google Scholar

Zhang & Iwatsuki. 2013. In FoC. Google Scholar