Modeling Material Symmetry - Continuum Mechanics of Anisotropic Materials - page 81

Parenchyma

Xylem Vascular

bundle Phloem

Collenchyma
Epidermis

Fig. 4.6 A three-dimensional view of a nasturtium petiole; note curvilinear orthotropic symmetry,
reprinted from Wainwright et al. (1976)

Fig. 4.7 Extrusion or rolling induces anisotropy in a steel product