The support structure of Cholla cacti provides stabilization via hollow cylindrical struts joined as trusses.
"Some cacti (such as the cholla), though, have supportive columns of branched and rejoining struts--trusses in the form of hollow cylinders with perforated walls." (Vogel 2003:437-438)
Learn more about this functional adaptation.
- Steven Vogel. 2003. Comparative Biomechanics: Life's Physical World. Princeton: Princeton University Press. 580 p.
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