Funding for this research was provided by:
Eppley Foundation for Research
Received: 4 September 2021
Accepted: 4 April 2022
First Online: 27 April 2022
: Plant material used in this study was collected in the field under the collection permits granted to Dr. Rachel Meyer (University of California Santa Cruz) for <i>Ephedra californica</i> (Voucher No. 15–17. February 2018, Zumajo-Cardona C. and Mayer R, NYBG) and to Dr. Alejandra Vasco (Botanical Research Institute of Texas) for <i>Ephedra antisyphilitica</i> (Voucher No. 18–21. Zumajo-Cardona C., Vasco A., Bordelon A., and O’Kennon B, NYBG).
: The authors declare that they have no competing interests.