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stem. The coral honeysuckle appears to have the 

 stem growing through the very middle of each leaf; 

 in this plant two opposite leaves grow together at 

 their lower portions. 



Some leaves are heart-shaped, as those of the 

 morning-glory and violet ; others are quite round, as 

 those of some water-lilies ; some are lance-shaped, 

 or arrow-shaped, and so on for many varieties. The 

 student of botany should draw or press examples of 

 all these shapes and margins. 



While all these forms of leaves have some re- 

 semblance to each other and their position as foliage 

 is clearly evident, other leaves are so remarkabl}^ 

 modified that their character is scarcely recognized 

 at first sight. Thus the barberry rolls up some leaves 

 into sharp, woody thorns, the mid-rib embracing all 

 the other parts. The pea, as we have seen, details 

 some leaflets for tendrils ; the agave, or century 

 plant, builds up great leaves, one or two inches thick, 

 using the green outer portions to do leaf duty, and 

 the white inner part to serve as storehouses. 



The sun-deAV and dionea, or fly-trap, separate a 

 portion of the leaf, edge it with prickles, provide it 

 with honey-drops, turn the mid-rib into a sensitive 

 hinge, and lo, a bait and a trap for catching unwary 

 insects ! The pitcher-plant in its several varie- 

 ties unites the outer edges of a part of the leaf 



