For Ophioglossum
Lellinger, D.B. 1985. A field manual of the ferns and fern allies of the United States and Canada. Smithsonian Institution Press, Washington, D.C. Google Scholar
Liu & Sahashi. 2013. In FoC. 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
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
Wan, X., L. Zhang, and L.-B. Zhang. 2022. Validation and lectotypification of the fern combination Whittieria engelmannii (Ophioglossaceae). Phytotaxa 567(2): 205-206. Google Scholar
Zhang, L., and L.-B. Zhang. 2022. Phylogeny, character evolution, and systematics of the fern family Ophioglossaceae based on Sanger sequence data, plastomes, and morphology. Molec. Syst. Evol. 173: 107512. Google Scholar
Cite as...