THE ANGIOSPERMAE : LEAVES 



967 



Fig. 954. — Cotoueaster Iwrisontalis. Plagiotropic shoot 

 showing mosaic with leaves in two ranks. 



Fig. 955. — Hedera helix. Mosaic of leaves growing 



on a shaded wall. The ability of the Ivy to grow- 

 in deep shade is favoured by its effective mosaic. 



