Abstract
Gnetum, Ephedra and Welwitschia constitute a special group of plants which have an unique assemblage of characters common to both angiosperms and gymnosperms. These three were therefore placed in a separate family Gnetaceae under the order Gnetales. By the end of the 19th century the order was split into three separate families each with a single genus. Many morphological differences were brought to light by several taxonomists (Florin, 1931, 1933, 1934) and in the light of these observations Eames (1952) suggested the splitting of the Order Gnetales into Gnetales, Ephedrales and Welwitschiales. Gnetum is the only genus included under Gnetales. It is of special interest to morphologists and systematists because it is considered to be highest evolved among gymnosperms and showing close similarities to angiosperms than to Ephedra or Welwitschia.
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Augustine, A.C., D’Souza, L. (1999). Somatic Embryogenesis in Gnetum ula . In: Jain, S.M., Gupta, P.K., Newton, R.J. (eds) Somatic Embryogenesis in Woody Plants. Forestry Sciences, vol 59. Springer, Dordrecht. https://doi.org/10.1007/978-94-011-4774-3_5
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DOI: https://doi.org/10.1007/978-94-011-4774-3_5
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