Gnetophyta

Gnetophyta edo gnetophytes gimnospermoren dibisio bat da

Taxonomia

Gaur egun Gnetophytak hiru genero ditu:

Gnetum adibidez: Gnetum gnemon (haziak jangarriak).

Welwitschia espezie bat: Welwitschia mirabilis. basamortuan bizi da, Namibian eta Angolan.

Ephedra (batzuk sandabelarra dira, efedrina).

Wikimedia Commonsen badira fitxategi gehiago, gai hau dutenak: Gnetophyta

Burleigh, J. G., and S. Mathews. 2004. Phylogenetic signal in nucleotide data from seed plants: implications for resolving the seed plant tree of life. American Journal of Botany 91: 1599-1613 (abstract)
Gifford, Ernest M., Adriance S. Foster. 1989. Morphology and Evolution of Vascular Plants. Third edition. WH Freeman and Company, New York.
Hilton, Jason, and Richard M. Bateman. 2006. Pteridosperms are the backbone of seed-plant phylogeny. Journal of the Torrey Botanical Society 133: 119-168 (abstract)