Page 20 – Vascular cylinder at boundary between cortex and stele
Fig. 17 . Vascular cylinder at boundary between cortex and stele. Tangential sections of seedling stems to show the manner of root attachment, leaf gaps and an early stage of the vascular network at the boundary between the cortex and stele. A, radiating vascular strands from the roots, r and r₁, and other roots not shown in the section, leaf gaps (lg), with leaf traces (lt) passing through preprocambibium tissue (ppc) and root primordium rp in the specialized meristem at the boundary between the cortex and stele. B, radiating vascular strands from a root (r) and from another root not shwon in this section. Notice the leaf gap (lg) with a leaf trace (lt) passing through. rt, tip of the root initiated higher in stem. X50.