42 



FORMS OF SIMPLE LEAVES. 



A cordate leaf folium 

 cordatum (fig- 51 ). 

 (From the Latin, cor, a 

 heart.) Heart - shaped, 

 ovate, with two rounded 

 lobes at the base. 



Example : the Pente- 



Fig. 51. CORDATE. deria cordata, and com- 



mon morning-glory. 



Obcordate is the cordate reversed ; the sinus and lobes being 

 at the summit instead of the base of the leaf. (See Jig. 20.) 



An obovate leaf folium 

 obovatum (fg> 52). (From 

 the Latin, ovum, egg.) The re- 

 verse of ovate, egg-shaped, with 

 the base broader than the apex ; 

 and length greater than the 

 Fig. 5-2. OBOVATE. breadth. (See Jig. 20.) 



Example : the Arbutus uvi ursi. 

 An elliptic or oval leaf 

 folium ellipticum (fig. 

 53). Having a regular 

 outline, resembling an 

 ellipse : the curves of both 

 ends are alike, and it is 

 longer than it is wide. 



Example : the Magnolia 



Fig. 53. ELLIPTIC. glauca, common magnolia 



or beaver tree. 



An orbiculate leaf folium 

 orbiculatum (figvre 54). 

 (From the Latin, orbis, an orb.) 

 Having a circular outline. 



Example : the Glycine to- 

 mentosa. 



A cuniate or cunieform leaf 

 folium cunieforme (fg> 55). 

 (From the Latin, cuneus, a wedge.) 

 Wedge-shaped. Broad and obtuse at 

 the summit, and tapering gradually 

 almost to a point at the base. 



Example : the Quercus nigra, the 

 true black oak or black jack. 



Fig. 54. ORBICULATE. 



Fig. 55. CUNIEFORM. 



