no 



WAYSIDE WEEDS. 



" Recreative Science," * we fumisli you with a spe- 

 cimen (Fig. 72)j from which, we must learn our 

 lesson. One thing is very evident, that the broad 

 expanded portion or limb or blade of the leaf is 

 composed of two structures, the ribs or veins, and 

 the green pulp lying between. In most leaves one 



7x0.72. — ^Leaf of common Kettle, u^ Limb or blade; fi, petiole; c, stipules; 

 d, fail ; e e, Disr>iin ; /, base ; g, apex. 



maia or mid rib runs up the centre of the leaf, and 

 from this the veinings of the leaf branch out, inter- 

 lacing with one another. In some leaves, however, 

 there are more than one rib to the leaf, as you may 

 see in the common plantain (Fig. 62), if you either 



* The periodical in which these papers were originally published. 



