PLATE III. 



Fig. 4. Midrib of leaf, x 500. o, Water-storage cells; p, phloem of 

 midrib; q, conjunctive parenchyma separating xylem and phloem; r, 

 tracheids; s, xylem parenchyma. 



Fig. 5. Cross section of portion of leaf. x 500. t, Epidermis; u, 

 water-storage cells; v, photosynthetic cells; w, phloem of a vascular 

 bundle; x, xylem of a vascular bundle; y, resin duct, z, tracheids; a, 

 photosynthetic cells; b, water-storage cells. 



Fig. 6. Tangential section of leaf, x 300. c, Water-storage cells; d, 

 photosynthetic tissue. 



