The line between whether a plant is a "tree" or a "shrub" is sometimes very thin and quite blurry! We use the following criteria to decide which type applies to a certain plant:
Cedrus deodara 'Feelin Blue'
Cornus florida 'Suwannee Squat'
Cryptomeria japonica 'Golden Promise'
Illicium x 'Orion'
Osmanthus heterophyllus 'Kaori Hime'