Page 21 – Vascular tissue at the boundary between cortex and stele

Page 21 – Vascular tissue at the boundary between cortex and stele

c. 1940

Fig. 18 Vascular tissue at the boundary between cortex and stele. Transverse sections of the stems of a 10-1/2-months-old plant (A), of a 13-months-old plant (B and C) and of a shoot, near the lower limit of the cortex and stele. c, cortex; en, endodermis (?); per, pericycle (?); ps, procambium strand which forms part of the vascular network in older portions of the stem (cut in cross section); s, stele; st, starch grains. A, X170; B, C and D, X340.