Adenocarpus

Argyrocytisus

Berberis

Caragana

Cornus

Corylopsis

Cotinus

Cytisus

Edgeworthia

Encelia

Enkianthus

Genista

Hamamelis

Kerria

Magnolia

Paeonia

Parkinsonia

Parrotiopsis

Potentilla

Punica

Purshia

Rhododendron (defines evaluations)

Rhus

Ribes

Salix

Stachyurus

Stewartia