PLATE XXVII. 



Fig. 27. Cross section of leaf, x 270. 



Pig. 28. Cross section of pcre found in leaf, x 337. 



Fig. 29. Longitudinal section of leaf, showing hair in place, x 350. 

 A^ cutinized part of stalk of trichome; B, continuation of outer wall of 

 the epidermis; C, pore. 



Fig. 30. Part of longitudinal section of leaf hair, x 295. 

 Fig. 31. Stem hairs, x 80. 



