Chú thích Ephedrales

  1. ↑ Kramer, K.U.; (illustrations), P.S. Green; assisted by E. Götz (1990). Kramer, K.U.; Green, P.S., biên tập. The Families and Genera of Vascular Plants, Vol. 1: Pteridophytes and Gymnosperms. Berlin: Springer-Verlag. tr. 379–381. ISBN 3540517944. 
  2. ↑ Kew World Checklist of Selected Plant Families