28 PRINCIPLES OF BOTANY, ETC. 
the base have either a straight or somewhat arched 
ine, and the anterior part of the leaf is round, 
18. Unequal, (inequale), when one side of the 
feat is more produced than the other, fig. 248. 
19. Arrow-shaped, (sagittatum), when the base 
is divided into two prejecting pointed lobes, and the 
anterior part of the leaf is likewise pointed, fig. 44.. 
20. Spear-shaped, (hastatum), when the two 
pointed lobes of the base are bent outwards. 
21. Ear-shaped, (auriculatum), when there are 
at the base two small round lobes bent outwards. 
It is nearly the hastate leaf, only the lobes are 
smaller and round, fig. 292. 
ce. In respect of Circumference. 
92, Orbicular, (orbiculatum), when the diameter 
of the leaf on all sides is equal. 
23. Roundish, (subrotundum), differs little from 
the foregoing, only that the diameter is longer, el- 
ther from the base to the apex, or from side to 
side. | 
24, Ovate, (ovatum), a leaf which is longer than 
it is broad; the base is round and broadest, the apex 
narrowest. 
25. Oval or elliptical, (avale s. ellipticum), a leat 
whose length is greater than its breadth, but round 
both at base and apex. 
26. Oblong, (ablongum), when the breadth to the 
leneth is as 1 to 3, or the breadth always least, but 
the apex and base vary, that is, they are sometimes 
obtuse, sometimes pointed, ) 

