36 



FAMILIAR LESSONS IN BOTANY. 



Fig. 45. 

 Bipinnate. 



Fig. 46. Fig. 47. 



Parallel-veined Leave?. 



Fig. 48. 



The Onion Leaf is 



tubular. 



76. DEFINITION OF TERMS. 



Cordate, heart-sliaped. 



Deltoid, from the Greek letter delta, A 



Lanceolate, lance-shaped. 



Linear, thread or line. 



Orbicular, round. 



Oval, longer than broad. 



Peltate, shield-shaped. 



Pinnate, featlier-shaped. 



Reniform, Jvidney-shaped. 



Sagittate, arrow-shaped. 



Simtidate, spatula^ a thin knife used by druggists. 



77. Leaves are further distinguished by their margins 

 and their apex. The margin, when indented like a saw 

 (Fig. 49), is 5en We, as the chestnut and chinquapin; den- 

 tate (Fig. 50), when the teeth are perpendicular to the 

 edges, as the viburnum; hidentate (Fig. 51), larger teeth 

 with small ones between them (elm) ; repand (Fig. 52), 



77. What are serrate leaves? Dentate? Bidentatc ? Repand? Lobcd? 

 Entire? What is an accurainate apex ? Acute? Obtuse? Emaeginate? Cor- 

 date, etc. ? Have you learned aU about the diflfercEt forms of leaves ? 



