74 



ELE>lKNT9 OF STRUCTURAL BOTANY. 



Fig. 110 



Fig. 111. 



106. In the second clas.s the diflerent forms ai-ise 

 from the varying width of the base of the leaf, and we 

 thus have subulate or awl-shaped (Fig. 112), lanceolate, 

 ovate, and deltoid leaves (Fig. 118). 



Fig. 112. Fig. 113. 



107. In the third class, as the apex exi^anda, we have 



Fig. 117. Fig. 118. Fig. 114. Kic 115. Fig. 116. 



