Figure 10.3–Leaves in transverse (A), longitudinal (B), and suface view (C); stem in transverse view (D); and individual macerated cell (E), of Arceuthobium tsugense (A-D) and A. durangense (E). A: guard cell (g) x300. B: subsidiary cell (s) and guard cells, x300. C: SEM view showing emergent subsidiary cells, x360; D: vascular cylinder, x120. E: primary phloem fiber, x48.