STRUCTURAL BOTANY. 



47 



In view of the margin^ the leaf is entire, when it is 

 even-edged — that is, when the margin is destitute of inci- 

 sions. If a leaf has deep incisions, it is called lobed, cleft, 

 jparted, divided (see § 67 wdth figures in III.) The seg- 

 ments may be entire, or furnished with small incisions. 



If the margin of a leaf has small incisions , its out- 

 line is expressed as follows: 



Compare the figures below (YIII.) 



I "Legs of each angle unequal. . .serrate, or saw-toothed {a) 



Outer and 

 inner angles 

 of the inci- 

 sions both 

 pointed. 



the outer and inner 



angles obtuse, 



Legs of rarely right, or 



the angles J moderately acute. . .dentate or toothed (b) 



equal. ] the outer and inner 



angles very acute 



and the divisions 



narrow and long .fnnged or ciliate (c) 



Outer angles rounded, the inner ones pointed, 



the teeth broad and rounded crenate or scalloped (d) 



Outer angles rather pointed, the inner ones 



rounded repand, repand-toothed, wavy or undidate (e) 



Both outer and inner angles rounded sinuous or sinuate (f) 



Both outer and inner angles irregular and small erose, jagged, or 



gnawed (g) 



If the incisions of a serrate leaf (the serratures) are 

 very deep, the leaf is said to be cut or incised-serrate, and 

 if the indentations (teeth) of a dentate leaf are very deep, 

 it is cut or incised-toothed. We employ such terms as 

 douhle-serrate, double-dentate^ or douUe-creiiate, when the 

 incisions are unequal. 



