30 



THE LEAF. 



Fi. 35 



Fig. 37 



Heart-shaped, Fig. 35, (cordiform,) having 

 the length greater than the breadth with an 

 ovate form, hollowed out at the base. Ex. 

 Two-leaved Solomon's seal, (Convallaria bi- 

 folia.) 



Lunate, Fig. 36, (crescent-shaped,) or like 

 a half moon. It approaches the reniform, 

 but the two lobes at the base are more or less 

 pointed. Ex. Two leaved Birthwort, (Aris- 

 tolochia bilobata.) 



Arrow-shaped, Fig. 37, (sagittate,) triangular, with 

 the base divided, and ending in points, the other an- 

 gle extended and acute. Ex. Arrow-head, (Sagit- 

 taria sagittifolia.) 



I.yrate, Fig. 38, (lyratum,) lyre-shaped, cut lat- 

 erally into several transverse segments or lobes, 

 of which those nearest the stem are the smallest. 

 Ex. Lyre-leaved Sage, (Salvia lyrata.) 



Panduriform, Fig. 39, (fiddle- shaped.) It is ob- 

 long, broad at the two extremities, and contracted 

 in the middle. Ex. Virginian Bindweed, (Con- 

 volvulus panduratus.) 



Runcinate, Fig. 50, (lion-toothed,) cut into seve- 

 ral transverse acute segments, pointing backwards. 

 Ex. Dandelion, (Leontodon taraxacum.) 



Give an example of a heart-shaped leaf. Of a lunate leaf. Of an ar- 

 row-shaped leaf "What is the form of a lyrate leaf? Of a panduriforra 

 'eaf? Of aruncinate leaf? 



Fig. 40. 



