FORM OF LEAVES. 



Oval, Fig. 29, (elliptical,) having the length 

 greater than the width, with the curvatures at both 

 ends alike. Ex. (Lespideza prostrata.) 



Oblong, Fig. 30, (oblonga,) having the longitudi- 

 nal diameter several times greater than the trans- 

 verse. Ex. Urnbelled Wintergreen, (Pyrola um- 

 bellata,) Solomon's seal, (Convallaria.) 



Lanceolate, Fig. 31, (lanceolata,) spear-shaped. It 

 is several times longer than wide, gradually tapering 

 towards the two extremities, and ending in a sharp 

 point. Ex. Narrow Plaintain, (Plantago lanceolata,) 

 Sweet William, (Dianthus.) 



Fig. 30. 



Fig. 31. 



Fig. 32. 



Linear, Fig. 32, narrow, with the edges parallel, 

 except at the two extremities. Ex. Club Spurge, (Eu- 

 phorbia clava.) Most of the Grains and Grasses have 

 linear leaves. 



Subulate, Fig. 33, (awl-shaped,) gradually tapering 

 from the base, or insertion of the petiole, and ending 

 in a point. Ex. Common Sand wort, (Arenaria ru- 

 bra.) 



Reniform, Fig. 34, (kidney-shaped,) a short, 

 broad, round leaf, with a sinus, or hollow at 

 the base. Ex. Common Asarum, (Asarum 

 Canadense.) 



Give an example of an oval leaf. Of an oblong leaf. Of a lanceolate 

 leaf. Of a linear leaf. Of a subulate leaf. Of a reniform leaf. 

 3* 



