This group consists of types of plants which are compact in their habit of growth and some of which are thorny. They are excellent as barriers for two reasons: either because of their thorny character or because of their extremely close habit of growth. The first list (a) contains plants which hold their leaves during the winter months, and the second list (b) contains plants which do not hold their leaves during the winter months.

a. Holding leaves during winter:

Chamaecyparis pisifera plumosa Plume-like Cypress

Fagus sylvatica European Beech

Mahonia aquifolium Oregon Grape

Picea excelsa Norway Spruce

Pyracantha coccinea lalandi Evergreen Thorn

Thuja (in variety) Arborvitae

Tsuga canadensis Canadian Hemlock b. Not holding leaves during winter:

Acer campestre

European Cork Maple Berberis thunbergi

Thunberg's Japanese Barberry

Carpinus betulus

European Hornbeam

Chaenomeles japonica Japanese Quince

Citrus trifoliata Hardy Orange

Crataegus coccinea Scarlet-fruited Thorn

Crataegus cordata Washington Thorn

Crataegus crus-galli Cockspur Thorn

Crataegus oxycantha May Thorn

Fagus americana American Beech

Gleditsia triacanthos

Honey Locust Hippophae rhamnoides

Sea Buckthorn Lonicera fragrantissima

Early Fragrant Honeysuckle Maclura pomifera

Osage Orange Prunus spinosa

Black Thorn

Rhamnus cathartica Common Buckthorn

Rhamnus frangula (variety latifolia) Alder Buckthorn

Rosa rugosa Japanese Rose