Berberis gladwynensis

Berberis gladwynensis is a broadleaf evergreen barberry hybrid in the family Berberidaceae. Profile data for this taxon is limited; it is an introduced species grown primarily in the cultivar form 'William Penn,' a dense, mounding shrub reaching about 4 feet tall, hardy to Zone 6.

Site preference and cultural details are sparsely documented for this hybrid. It tolerates renovation pruning with up to 90 to 95 percent removal. Documented disease associations include leaf spot, rust, leaf scorch, and powdery mildew; lecanium scale is the primary pest of record.