252 PLANT ORGANS AND PARTS OF PLANTS. 



Fig. 74. — Pea. 

 On right side of illustration: I, Cross-section of testa; Ep, epider- 

 mis; H, hypodermis; II, palisade cells on flat; III, isolated palisade 

 cells; IV, hypoderm cells; V, epidermis in cotyledon leaves; VI, hypo- 

 derm cells on flat; VII, cotyledon epidermis. On left side: 1-5, Cell 

 fragments of cotyledons; II, starch; III, cotyledon parenchyma 

 (Vogl). 



