Photosynthesis (Net CO2 Exchange Rate) References
Stenocereus queretaroensis (F.A.C.Weber) Buxb. [Tree Cactus]
Nobel, P.S. 1996. Responses of some North American CAM plants to freezing temperatures and doubled CO2 concentrations: implications of global climate change for extending cultivation. Journal of Arid Environments 34: 187-196.