PLATE LV. 



Fig. 8. Cross section of leaf showing pai't of a large vein, x 375: a, 

 epidermal cells; b, mucilagenous cell; c, palisade cell; d, chloroplasts; 

 e, tracheids; /, glandular hair; g, long border parenchyma cells sur- 

 rounding the veins. 



Fig. 9. Cross section of a large vein, X 375: a, vascular bundle; 



b, border parenchyma cell; c, mucilagenous modification of cell walls. 

 Fig. 10. Cross section of leaf, x 275; a, palisade cells; b, small vein; 



c, stoma in cross section; d, longitudinal section through a stoma. 



Fig. 11. Tangential section of leaf, X 275: a, vein; b, ending of vein; 

 c, palisade cells. 



Fig. 12. Tangential section through palisade cells, X 275. 



Fig. 13. Tangential section showing epidermis, X 275: a, stoma; b, 

 mucilagenous cell. 



Fig. 14. Tangential section showing large border parenchyma cells 

 beneath vein, x 275. 



