84 



THE LEAF 



another step to winding about them in the fashion of a 



tenelriL The complete adoption of the clasping liabit, 



taken on in this case 

 by the petiole, is seen 

 in the Solanum jas- 

 minoidea 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 j>ro- 



longed medium portion of the blade in Gloriosa (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 rat'his, developed 



71. Tendril leaves of Gloriosa superha. 



T2. Tendril leaves of Lathy- 

 rus Apliaca, the stipules 

 performing the duty of 

 foliage. 



into a tendril having all 

 the qualities of the stem- 

 tendrils before described. 

 The leaflets also, in tliese 

 cases, may be transformed ^3. Tendril leaf of Coz-aa n!«cros(«),im« ,- 



St, main stem of the plant; If, the 

 extent of a single leaf. 



for tl; 



le same purpose. 



In 



