Vázquez-Sánchez M., Terrazas T., Grego-Valencia D., Arias S., Growth form and wood evolution in the tribe Cacteae (Cactaceae), Willdenowia, 2017, 47(1):49-67, doi: 10.3372/wi.47.47106
A comparison of growth form and anatomy in 135 Cacteae taxa and a reconstruction of changes in seven traits on a phylogenetic tree. The authors describe wood types and the structure of the hypodermis, cortex and pith. They discuss the contribution of these tissues to mechanical stem support and deformation during drought.