76 



ELEMENTS OF STRUCTURAL BOTANY. 



given. If the leaves are vei-y deeply cut, they are paid 



to be p<(hn((tijid or pinnatifid according to the veiuing 



(Fig. 124). If the leaf is palmately lobed, 



and the lobes at the base are themselves 



lobed, the leaf is jmlate (Fig. 125), be- 

 cause it looks something like a bird's 



foot. If the lobes of a pinnatifid leaf 



are themselves lobed. the leaf is hipinna- 



tifid. If the leaf is cut up into fine 



segments, as in Dicentra, it is said to be 



mnltijid. 



110. Apex. The principal forms of 



the apex are the mucronate (Fig. 122), 



when the leaf is tipped with a sharp 



point, as though 

 were projecting 

 blade ; cuspidate, when the leaf 

 ends abruptly in a very short, 

 but distinctly tapering, point 

 (Fig. 126) ; acute, or sharp; and 

 obtuse, or blunt. 



111. It may happen that the 

 If 



Fig. 124. 



the midrib 

 beyond the 



Fig. 125. 



apciv does not end in a point of any kind. 



it looks as though 



the end had been cut off 

 square, it is truncate. If the end is slightly 

 notched, but not sufficiently so to warrant the 

 description obcordate, it is emanjinate. 



Pig. 12G. 



112. Margin. If the margin is not indented in any 

 way, it is said to be entire. If it has sharp teeth, point- 

 ing in the direction of the apex, it is serrate, and will be 

 coarsely or finely serrate, according to the size of the 



