Figure 2.

Anatomy of adult leaves of Delosperma cooperi. (a) Cross-section of the entire leaf (stained with toluidine blue) comprising five tissue layers: epidermis (ep) with window cells (wc), chlorenchyma (ch), net of peripheral vascular bundles (nvb), parenchyma (pa) and central vascular bundle (cvb). (b, c) Cross-sections of vascular tissues with xylem (xy) and phloem (ph), (b) central vascular bundle, (c) peripheral vascular bundle with wide-band tracheids showing pronounced cell wall thickenings.