PLATE LIV. 



Fig. 1. Tip of leaf showing venation, x 66: a, group of tracheids 

 where veins end; b, free endings of veinlets. 



Fig. 2. Venation farther back from the apex, X 66. 



Detailed drawing of group of tracheids at end of vein, X 275. 



Stellate hair from epidermis of leaf, X 175. 



Cross section of stoma of leaf, X 375: a, air chamber. 



Cross section lateral view of stoma. 



Epidermis of stem showing stomata, x 275. 



