424 



ANGLES OF LEAVES. 



the transverse, and the circumscription of both upper and lower 

 extremity is narrower than the segment of a circle. 



5. Parabolic, in the form of a parabola* ; when the longitu- 

 dinal diameter exceeds the transverse, and the figure contracting 

 from the base upwards becomes Semiovate> half-egg-shaped. 



6. Spatulate, resembling a spatulaf; when the figure is 

 roundish, but lengthened out by the addition of a linear base 

 that is narrower. 



7. Cuneiform, wedge-shaped ; when the longitudinal diameter 

 exceeds the transverse, and the figure gradually contracts down- 

 wards. 



§. Oblong, when the longitudinal diameter is twice, thrice, 

 &c. the length of the transverse, and the circumscription of 

 each of the extremities is narrower than the segment of a circle. 



Hi Angles are the prominent parts of a horizontal leaf. In, 

 respect to these, a leaf is, 



1. Lanceolate, spear-shaped; when the figure is oblong, nar- 

 rowing gradually at each end towards the extremity. 



2. Linear; when it is every where of the same breadth, 

 though sometimes narrowing at the extremities only. 



3. Acerose, chaffy; when it is linear and persisting as in 

 Pinus,. .. Abies,. ..Juniperus,... and Taxus. 



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

 dually contracting towards the top. 



5. Triangular, three-cornered ; when the disk is surrounded 

 by three prominent angles. 



* A geomstric curve so called. Ebitor. 



+ A surgeon's instrument so called. Editor, 



