FORMS BROADEST ABOVE THE MIDDLE 



181 



Lanceolate (Fig. 496). One which is ovate, but with the greatest 

 breadth at the very base, the margins not or but httle curved, so that 

 it is approximately triangular, is called Deltoid (Fig. 498). 



One still narrower, but of similar form, bearing the same relation to 

 the lanceolate which the deltoid does to the ovate, is called Subulate, 

 or awl-shaped (Fig. 499). 



An ovate or oval leaf whose outline, instead of being regularly curved, 

 is made up of four comparatively straight lines is called Trapezoidal or 

 AnOTilarlv-nvate. Another term which is applied to it is Rhomboidal 

 (Fig. 500). 



Leaf outlines: Fig. 498. Deltoid (Betula). 499. Subulate (diagrammatical). 500. Rhomboidal 

 iChekan). 501. Obovate (Lindera). 502. Oblanceolate {Solidago). 503. Spatulate (Antennarid) . 

 504. Falcate (Eucalyptus). 505. Inaequilateral {Hamamelis). 



Forms Broadest above the Middle. — Most of the forms just referred to 

 are paralleled by exactly similar forms in which the widest portion is 

 above the middle. The names for these are formed by prefixing the 

 syllable oh to the corresponding names of the other forms; as, Obqvate_ 

 (Fig. 501), OblanceolateJFig. 502). 



When an Obovate or Oblanceolate/ leaf possesses a broad, rounded 

 apex, and a somewhat elongated lower portion, it is called Spatulate 

 (Fig. 503). ^ 



The outline of a leaf is greatly modified when the portion upon one 

 side of the midrib is longer or broader than that upon the other, giving 

 us Inequilateral, Unequa l, or Oblique forms (Fig. 505). 



