20 



A STUDY OF LEAVES. 



APEX. 



The Apex is the upper end of the leaf. The 

 following forms are common : 



a. Obcordate, like an inverted heart. 



b. Emarginate, with an inward notch. 

 c Truncate, cut off square. 



d. Obtuse, rounded at the point. 



e. Acute, gradually pointed. 



/. Mucronate, with a spiny point. 

 g. Cuspidate, abruptly pointed. 

 h. Acuminate, with a long point. 



Fig. x. 



Sometimes the apex is devel- 

 oped into a tendril for the purpose 

 of climbing (Fig. x\ when the leaf 

 is said to be Cirrous, 



