THE TYPICAL LEAF AND ITS PARTS 



31 



18-26. — Petioles, and leaf attachment: 18, petioles of jasmine nightshade 

 {Solarium jasminoides) acting as tendrils ; 19, acacia, showing petiole transformed 

 to leaf blade ; 20, petiole of sycamore hollowed out to protect the bud of the season ; 

 21, clasping leaf of lactuca; 22, deourrent leaf of thistle; 23, connate leaves of 

 honeysuckle; 24, perfoliate leaves of uvularia; 25, peltate leaf of tropteolum ; 

 26, equitant leaves of iris. (18, 20, 23, 24, 25, and 26, after GRAY.) 



