For Pellaea
Gastony, G.J. 1988. The Pellaea glabella complex: electrophoretic evidence for the derivations of the agamosporous taxa and a revised taxonomy. Amer. Fern. J. 78: 44-67.
Gastony, G.J., and D.R. Rollo. 1998. Cheilanthoid ferns (Pteridaceae: Cheilanthoideae) in the southwestern United States and adjacent Mexico – a molecular phylogenetic reassessment of generic lines. Aliso 17: 131-144.
Gastony, G.J., G. Yatskievych, and C.K. Dixon. 1992. Chloroplast DNA restriction site variation in the fern genus Pellaea: phytogenetic relationships of the Pellaea glabella complex. Amer. J. Bot. 79: 1072-1080.
Heafner, K.D. 2001. Pellaea wrightiana Hooker (Pteridaceae) in North Carolina revisited with a new record for eastern North America and a key to Pellaea species in the Carolinas. Castanea 66: 319-326.
Kessler, M., A.R. Smith, & J. Prado. 2017. Prodromus of a fern flora for Bolivia. XXVII. Pteridaceae. Phytotaxa 332: 201-250.
Tryon, Tryon, & Kramer. 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.
Wagner, W. H. 1965. Pellaea wrightiana in North Carolina and the question of Its origin. J. Elisha Mitchell Sci. Soc. 81(2): 95-103.
Windham, M.D. 1993c. Pellaea. 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.
Windham, M.D., L. Huiet, J.S. Metzgar, T.A. Ranker, G. Yatskievych, C.H. Haufler, and K.M. Pryer. 2022. Once more unto the breach, dear friends: resolving the origins and relationships of the Pellaea wrightiana hybrid complex. Am. J. Bot. 109(5): 1–-0. https://doi.org/10.1002/ajb2.1850
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