12 



BOTANY. 



we can often easily and very nearly approach correctness 

 by combining two of them, as ovate-lanceolate, linear- lance- 

 olate, cordate-ovate, roundish-ovate, etc. 



Facility and correctness of leaf - description depend 

 upon practice. If the scholar will add the question, Fig- 

 ure? to the other questions of Ex. Ill, and answer them all 

 faithfully in writing, according to his best judgment, con- 

 cerning every leaf he finds, he will soon have command of 

 this portion of descriptive botany. 



EXERCISE V. 

 Compound Leaves. 



The leaves you have been describing have only one 

 blade, and are therefore called simple leaves ; but there 

 are hosts of leaves, resembling Fig. 44, which, you see, 



Leaflet. 



Rachis. 

 ._ ^-Petiolule. 



Petiole. 

 Stipules. 



FIG. 45. 



FIG. 44. 



has several blades. A leaf with more than one blade is 

 a compound leaf, and each of its blades is called a leaflet. 

 Gather all the compound leaves you can find and compare 

 them with Fig. 44. Point out and name their parts. 



Some compound leaves have no rachis, but the leaflets 

 all grow out from the top of the petiole (Fig. 45). These 

 two kinds of compound leaves correspond to the two 



