FIGURE 4 in Re-establishment of Begonia corallina Carrière (Begoniaceae) based on morphoanatomical evidence

FIGURE 4. Leaf blade cross section and frontal view of Begonia corallina (A, C, E, G, I K) and Begonia maculata (B, D, F, H, J, L). A-B. Overview showing unistratified epidermis (Ep) with anisocytic stomata (St) on the abaxial surface, palisade (Pp) and spongy (Sp) parenchyma. C. Glandular trichome (Gt) sunk in the epidermis. D. Glandular trichome showing unicellular base, biseriate short stalk and multicellular biseriate secretory head. E. Detail showing palisade (Pp) and spongy (Sp) parenchyma. F. Detail showing palisade (Pp) and spongy (Sp) parenchyma with sclereids (Sc). G–H. Frontal view showing druses (arrowhead) and sclereids (arrow) on the midrib (Mr), secondary (2a) and tertiary (3a) veins. I. Midrib with concave shape, collenchyma (Co), vascular bundles (Vb) organized in circle and sclereids (arrow). Inset shows vascular bundle in detail, highlighting the perivascular fibers. J. Midrib with concave shape, few layers of collenchyma (Co), three vascular bundles (Vb) and sclereids (arrow). K. Sclereids (Sc) with rectangular shape. L. Sclereids (Sc) with irregular shape. Bars: G, H, J = 300 µm, A-B = 120 µm, C-K = 60 µm, D, E, F, I, L = 30 µm.