DSCN2734 variation in holly leaves

DSCN2734 variation in holly leaves

Observation - DSCN2734 variation in holly leaves. Description: first photo shows lots of leaf variation on one branch, second photo is a younger offshoot on same tree, so am wondering if there is a problem with the older branch affecting leaf formation or if the age of holly trees usually affects it, any ideas?,thank

first photo shows lots of leaf variation on one branch, second photo is a younger offshoot on same tree, so am wondering if there is a problem with the older branch affecting leaf formation or if the age of holly trees usually affects it, any ideas?,thanks