After Earle, 2002

<==o Ephedra Linnaeus 1753 ()? [37]
   |-- E. arenarius
   |-- E. altissima
   |-- E. americana
   |-- E. andina
   |-- E. breana
   |-- E. ciliata
   |-- E. helvetica
   |-- E. rupestris
   |-- E. antisyphilitica Berlandier ex Meyer 1846
   |-- E. aspera Engelmann ex Watson 1883
   |-- E. californica Watson 1879
   |-- E. coryi Reed 1936
   |-- E. cutleri Peebles 1940
   |-- E. distachya Linnaeus
   |-- E. equisetina Bunge 1851
   |-- E. fasciculata Nelson 1934
   |-- E. fedtschenkoae Pauls. 1905
   |-- E. fragilis Desf.
   |-- E. frustillata Miers 1863
   |-- E. funerea Coville & Morton 1935
   |-- E. gerardiana Wall. ex C.A. Mey. 1846
   |-- E. intermedia Schrenk ex C.A. Mey. 1846
   |-- E. lepidosperma C.Y. Cheng 1975
   |-- E. likiangensis Florin 1933
   |-- E. macedonica Kos.
   |-- E. major Host.
   |-- E. minuta Florin 1927
   |-- E. monosperma C.A. Mey. 1846 
   |-- E. nevadensis Watson 1879
   |-- E. pedunculata Engelmann ex Watson 1883
   |-- E. przewalskii Stapf 1889
   |-- E. regeliana Florin 1933
   |-- E. saxatilis Royle ex Florin 1933
   |-- E. sinica Stapf 1927
   |-- E. torreyana Watson 1879
   |-- E. trifurca Torrey ex Watson 1871
   `-- E. viridis Coville 1893

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