LEAVES. 



53 



Digitate, spreading like the fingers of the hand. (Fig. 63.) 



90. The above are the simple forms. It is very frequently 

 the case that two of the forms -will combine, and then the 

 leaf receives a compound name. 



Ovate-lanceolate, when it is too long to be strictly ovate, and 

 gradually tapers to the extremity, resembling an ovate leaf in 

 some respects and a lanceolate one in others. 



Ob-cordate, heart-shaped, with the small end towards the 

 stem. 



Ob-ovate, egg-shaped, w T ith the small end towards the stem. 



91. The edges of leaves are variously formed by irregulari- 

 ties, and receive specific names, of w hich the following are most 

 common. If the edge is uniform, it is said to be entire. 



Serrate, having teeth like a saw, the points directed toward 

 the apex. (Fig. 64.) 



Dentate, when the teeth are perpendicular to the edge, with 

 the sides equal. (Fig. 65.) 



Bidentate, large teeth with small ones on them. Biserrate, 

 with similar application. 



Fig. 64. Fig. 65. Fig. 66. Fig. 67. 



Serrate leaf. 



Dentate leaf. 



Crenate leaf. 



Crenate, when the teeth are rounded at their points. 

 66.) 



Rep and -toothed, when it is hollowed out between the teeth, 

 but the teeth are sharp. (Fig. 67.) 



Sinuate-toothed, when the teeth and intermediate angles are 

 rounded. (Fig. 68.) 



Fig. 68. 



Fig. 69. 



Fig. 70. 



Ciliate leaf. 



Digitate ?— 90. What is an ovate-lanceolate leaf? Ob-cordate? Ob- 

 ovate?— 91. What is an entire leaf? Serrate? Dentate? Bi-dentate? Cre- 

 nate ? Kepand- toothed ? Sinuate-toothed ? 



