KINDS AND FORMS OF LEAVES. 



49 



Retuse ; having a blunt or rounded apex slightly indented, as in Fig. 109. 



Emarginate, or Notched ; as if a notch were cut out of the apex; Fig. 110. 



Obcordate, or Inversely heart-shaped ; that is, with the strong notch at the apex 

 instead of the base, as in Fig. Ill and the leaflets of White Clover. 



Cuspidate ; tipped with a rigid or sharp and narrow point, as in Fig. 112. 



Mucronate ; abruptly tipped with a short and weak point, like a small projection 

 of the midrib, as in Fig. 113. 



Awned, Awn-pointed, or Aristate ; tipped with a long bristle-shaped appendage, 

 like the beard (aivn) of Oats, &c. 



105 106 



112 113 



Apex of 



Leaves : 



Poinled. Acute. Obtuse. Truncate. Retuse. 



Notched. 



Obconjate. Cuspidate. Mucronate. 



138. As to the margin, whether whole, toothed, or cut, leaves ai'e said to be 

 Entire ; when the margin is an even line, as in Fig. 99 to 102. 



Toothed; Avhen beset with teeth or small indentations; of this there are two or 

 three varieties, as. 



Serrate ov Saw-toothed ; when m ns iis 117 ns 119 



the teeth turn forwards, like 

 those of a saw, as in Fig. 114. 



Dentate ; when they point 

 outward, as in Fig. 115. 



Crenate ; when scallojyed in- 

 to broad and rounded teeth, as r* 

 in Fig. 116. \ 



Wavy {Repand or Undulate) ; 

 when the margin bends sUghtly 

 in and out, as in Fig. 117. 



Sinuate ; strongly wavy or 

 sinuous, as in Fig. 118. 



Incised or Jagged ; cut into deep and irregular, jagged teeth or incisions, as in 

 Fig. 119. This leads to truly 



139. Lobcd or Cleft Leaves, &c. : those with the blade cut up, as it were, into parts, 

 i. e. lobes or divisions. In a general way, such leaves are said to be lobed ; and the 



Berrate. Dentate. Crenate. Wavy. Sinuate. Incised or Jagjed. 



