THE MORPHOLOGY OF WEEDS 



123 



Fig. 51. i, cor- 

 date leaf; 2, ovate 

 leaf. 



Fig. 55- 3, ellipti- 

 cal; 4, oblong leaf; 

 5, obovate; 6,cuneate 

 or wedge shaped. 



7 8- 7 'o 



Fig- S3- 7. lanceo- 

 late leaf; 8, linear; 

 9, oblanceolate; 10, 

 spatulate. 



Fig. 52. i, sagit- 

 tate; 2, auriculate; 

 3, halberd shaped. 



/~\r\ 



Fig. 54. Apex of leaves: i, 3, types 

 of obcordate leaves; 2, emarginate; 4, 

 truncate. 



or 6 7 



Fig. 56. Apex of leaves: 5, obtuse 

 leaf; 6, acute; 7, acuminate; 8, 9, 

 mucronate. 



Fig- 57- 7, shield-shaped leaf; 8, acutely three-lobed leaf; 9, pel- 

 tate palmately lobed leaf of castor oil; 10, n, types of palmately com- 

 pound leaves. 



