Buddleja globosa found growing wild

On my daily walk along the Centenary walk in Bridge of Allan I found this shrub growing wild with yellow Pom-Pom flowers. It has been identified as Buddleja globose. Not sure if is as attractive to butterflies as the usual Buddleja but it’s very attractive. Extra shows butterflies on Buddlejas at allotment. These pictures of them being shot by allotment neighbour Jean Pedder