Photo of a Dwarf Barberry plant among several rare or botanically interesting plant species that cover about seven of the 17-acre locks reservation at Lake Washington Ship Canal and Hiram M. Chittenden Locks, Seattle, Washington. The ArbNet Arboretum Accreditation Program and The Morton Arboretum awarded this accreditation to the Carl S. English Jr. Botanical Garden, one of the only two within the U.S. Corps of Engineers, for achieving particular standards of professional practices deemed important for arboreta and botanic gardens.