Aesculus

Alnus

Amelanchier

Aralia

Aronia

Baccharis

Buddleia

Callicarpa

Ceanothus

Chaenomeles

Chionanthus

Clethra

Crataegus

Deutzia

Enkianthus

Fothergilla

Franklinia

Hibiscus

Holodiscus

Hovenia

Hydrangea

Kerria

Leucothoe

Leycesteria

Loropetalum

Malus

Menziesia

Neviusia

Oplopanax

Paeonia

Parrotiopsis

Philadelphus

Photinia

Physocarpus

Poncirus

Prunus

Pterostyrax

Rhododendron (defines evaluations)

Rhodotypos

Rhus