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34 gnetophytes species
Ephedra viridis
Ephedra nevadensis
Ephedra funerea
Ephedra torreyana
Ephedra tweedieana
Ephedra triandra
Ephedra gerardiana
Ephedra aspera
Ephedra californica
Ephedra foeminea
Ephedra trifurca
Ephedra antisyphilitica
Ephedra sinica
Ephedra pedunculata
Ephedra equisetina
Ephedra fragilis
Gnetum gnemon
Ephedra distachya
Ephedra cutleri
Welwitschia mirabilis
Ephedra intermedia
Ephedra americana
Ephedra regeliana
Ephedra przewalskii
Ephedra trifurcata
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