References

For Botrychium

Hauk, W.D., C.R. Parks, and M.W. Chase. 2003. Phylogenetic studies of Ophioglossaceae: evidence from rbcL and trnL-F plastid DNA sequences and morphology. Molec. Phylogen. Evol. 28: 131-151. Google Scholar

Stensvold, M.C., and D.R. Farrar. 2017. Genetic diversity in the worldwide Botrychium lunaria (Ophioglossaceae) complex, with new species and new combinations. Brittonia 69: 148-175. Google Scholar

Wagner, W.H., Jr., and F.S. Wagner. 1993. Ophioglossaceae. 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. 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

Williams, E.W., D.R. Farrar, and D. Henson. 2016. Cryptic speciation in allotetraploids: lessons from the Botrychium matricariifolium complex. Amer. J. Botany 103(4): 1-14 Google Scholar