Gnetidae

Gnetidae
Scientific classification
Kingdom:	Plantae
Class:	Equisetopsida
Subclass:	Gnetidae Pax in K.A.E.Prantl 1894
Families & Genera
Gnetaceae Gnetum Welwitschiaceae Welwitschia Ephedraceae Ephedra

Gnetidae is a subclass of Equisetopsida in the sense used by Mark W. Chase and James L. Reveal in their 2009 article "A phylogenetic classification of the land plants to accompany APG III."^[1] This subclass comprises the gnetophytes. The Gnetidae subclass is equivalent to the division Gnetophyta and class Gnetopsida of previous treatments.

Phylogeny

The following diagram shows a likely phylogenic relationship between subclass Gnetidae and the other Equisetopsida subclasses.^[2]

Equisetopsida  Marchantiidae   Bryidae   Anthocerotidae   Lycopodiidae   Equisetidae   Ophioglossidae   Marattiidae   Polypodiidae   Cycadidae   Ginkgoidae   Gnetidae   Pinidae   Magnoliidae

bryophytes lycopodiophytes monilophytes gymnosperms angiosperms

References

1. Mark W. Chase & James L. Reveal (2009). "A phylogenetic classification of the land plants to accompany APG III". Botanical Journal of the Linnean Society 161: 122–127. doi:10.1111/j.1095-8339.2009.01002.x.
2. Maarten J. M. Christenhusz, James L. Reveal, Aljos Farjon, Martin F. Gardner, Robert R. Mill, Mark W. Chase (2011). "A new classification and linear sequence of extant gymnosperms" (PDF). Phytotaxa 19: 55–70.