Plantae | Caryophyllales | Cactaceae | Pachycereus | Pachycereus pringlei
Niklas KJ, Molina-Freaner F, Tinoco-Ojanguren C, Paolillo DJ Jr. 2002. The Biomechanics of Pachycereus pringlei Root Systems. American Journal of Botany 89(1): 12-21.