84 



THE LEAF 



another step to winding about them in the fashion of a 

 tendril. The complete adoption of the clasping habit, 



taken on in this case 

 by the petiole, is seen 

 in the Solanum jas- 

 miiioides of the gar- 

 dens (Fig. 70) and 

 the common Clem- 

 atis. 



147. Or the ten- 

 dril habit may orig- 

 inate in the blade 

 itself. Thus the pro- 

 longed medium portion of the blade in Grloriosa (Fig. 71) 

 curves round the supporting object. This is a simple 

 leaf. Several compound 

 leaves, as those of the Pea 

 and Sweet Pea, have the 

 extremity of the main 

 stalk, or rachis^ developed 



71. Teudril leaves of GloHosa superba. 



72. Tendril leaves of Lathy- 

 rus Aphaca, the stipules 

 performing the duty of 

 foliage. 



into a tendril having all 

 the qualities of the stem- 

 tendrils before described. 

 The leaflets also, in these 



cases, may be transformed '^^- Tendril leat of Cobseamacrostemma; 

 ^ T -f St, main stem of the plant; If, the 



for the same purpose. In extent of a single leaf. 



