References

For Botrypus

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

PPG I. 2016. A community-derived classification for extant lycophytes and ferns. J. Syst. Evol. 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

Zhang & Sahashi. 2013. In FoC. Google Scholar

Zhang, L., X.‐P. Fan, S. Petchsri, L. Zhou, R. Pollawatn, X. Zhang, X.‐M. Zhou, N.T. Lu, R. Knapp, S. Chantanaorrapint, P. Limpanasittichai, H. Sun, X.‐F. Gao, and L.‐B. Zhang. 2020. Evolutionary relationships of the ancient fern lineage the adder's tongues (Ophioglossaceae) with description of Sahashia gen. nov. Cladistics 36: 380-393. Google Scholar