Euphyllophytina, the euphyllophytes, is a taxon – sometimes unranked, sometimes placed at the informal rank of subdivision – within the tracheophytes. It is sister to subdivision Lycopodiophyta. Euphyllophytina contains the two groups Spermatophytes (seed plants) and Monilophytes (ferns), as well as a number of extinct fossil taxa. The division of the extant tracheophytes into three monophyletic lineages is supported in multiple molecular studies.

Synonyms: Euphyllophytes

Reference:

1. http://en.wikipedia.org/wiki/Euphyllophytina

2. Smith, A. R., K. M. Pryer, et al. (2006). "A classification for extant ferns." Taxon 55(3): 705-731

3. Pryer, K. M., H. Schneider, et al. (2001). "Horsetails and ferns are a monophyletic group and the closest living relatives to seed plants." Nature 409(6820): 618-22

4. Pryer, K. M., E. Schuettpelz, et al. (2004). Phylogeny and evolution of ferns (monilophytes) with a focus on the early leptosporangiate divergences 1, Botanical Soc America. 91: 1582-1598