Longitudinal sections of prickly pear cladodes (Opuntia ficus-indica) of the Solferino cultivar. C= cuticle (A, C), E= epidermis (A, C), Col= collenchyma (A, C), D= druses (calcium oxalate crystals) (C, H), P= parenchyma (B, D, F, G, H), M= mucilage (F), X= xylem (D, E). Bar= A, B, F, and J 40 µm, 10X; C, D, E, G, H, and I 10 µm, 40X.