PLATE II. 



Fig. 1. Bleached leaf, showing venation. X 20. a, Water-storage 

 tissue between the three largest veins. 



Fig. 2. Diagram of a cross section of leaf, showing arrangement of 

 tissue. X 70. b, Photosynthetic tissue; c, conducting tissue; e, water- 

 storage tissue; d, midrib. 



Fig. 3. Cross section of leaf. X 130. /, Epidermis; g, stoma; h, 

 photosynthetic cells; i, vascular bundle; j, cells near the veins which con- 

 tain chloroplasts; A", resin gland; I, resin duct; m> water-storage cells; n, 

 tracheids. 



