PROTECTION OF GREEN LEAVES AGAINST ATTACKS OF ANIMALS. 449 



sketched in the case of the Barberry. As long as the young tender foliage-lea 

 re mal n m this station between the two spiny stipules (fig. U 8 .) they 235 



at an end 



. 



TSLS e y at an end when they h - *- * 



Most of the last-described protective contrivances only defend the green foliage 



Fig. 118.-Weapons of Plants. 



' Branch of the Tragacanth bush (Astragalus Tragaeantha) in spring. A single leaf of this Tragacanth from which the 



upper leaflets have fallen. * Leaf -axis from which all the leaflets have fallen. * Portion of a shoot of ftobinia Pseudacacia 

 in spring. The spiny Cytisus (Cytisus spinosus), , 1 Portions of branches of the Barberry (Berberit vulgari$) in spring. 

 8 Velio, spinosa ; the end of last year's shoot is dried up ; this year's shoot bears flowers. 



whilst it is young. But this is exactly the time when protection is most needed. 

 If, later on, isolated foliage-leaves, which have grown beyond the points of the 

 prickles, are eaten, this does not so much matter, as part of the foliage still certainly 

 remains, and this is really the important point. 



From the fact that the protection of the young green leaves is secured by 

 VOL.L M 



