PLATE LVII. 



Fig. 20. Composite drawing of bleached leaf, x 350. 6, epidermis; 

 c, stoma; d, trichoma; e, palisade cells; /, veins. 



Fig. 21. Longitudinal section through midrib of leaflet, x 292. t, 

 bast fibers; u, wood parenchyma; v, tracheids; w, stone cells. 



Pig. 22. Cross section of leaf, x 350. k, upper epidermis; o, stoma; 

 /, g, c, air chamber; d, palisade tissue; e, vein; h, parenchyma; h, lower 

 epidermis. 



Fig. 23. From midrib of leaf. Sheath broken, showing bast fibers (m) 

 beneath, x 292. 



Fig. 24. Cross section of leaf petiole, (z) bundle, x 63. . 



Fig. 25. Tangential section leaflet petiole, x 63. 



Fig. 26. Starch-containing cells from leaflet petiole, x 618. 



