TO BOTANY. 12 



scribed with the segment of a circle, but the apex is 

 narrower. 



Oval, or Elliptic; when the longitudinal diameter 

 exceeds the transverse, and the circumscription of 

 both upper and lower extremity is narrower than the 

 segment of a circle. 



Parabolic, in the form of a Parabola* ; when the 

 longitudinal diameter exceeds the transverse, and the 

 figure, contracting from the base upwards, becomes 

 Semi-ovate, half egg shaped. 



Spatulate, resembling a Spatulaf ; when the figure 

 is roundish, but lengthened out by the addition of a 

 linear base that is narrower. 



Cuneiform, w r edge-shaped ; when the longitudinal 

 diameter exceeds the transverse, and the figure gra- 

 dually contracts downwards. 



Oblong, when the longitudinal diameter is twice, 

 thrice, c. the length of the 'transverse, and the cir- 

 cumscription of each of the extremities is narrower 

 than the segment of a circle. 



ANGLES are the prominent parts of an horizontal 

 leaf. In respect to these a leaf is, 



Lanceolate, spear-shaped ; when the figure is ob- 

 long, narrowing gradually at each end towards the 

 extremity. 



Linear ; when it is every where of the same 

 breadth, though sometimes narrowing at the extre- 

 mities only. 



Acerose, chaffy ; when it is linear and persisting ; 

 as in Pinus, Abies, Juniperus and Taxus. 



Subulate, awl-shaped ; when it is linear below, but 

 gradually contracting towards the top. 



Triangular, three- cornered ; when the disk is sur- 

 rounded by three prominent angles. 



Quadrangular^ Quinquangular, c. four- cornered, 



* A geometric Curve so called, 

 t A surgeon's instrument so called. 

 I 



