Under the less severe conditions of seaside exposure there is a greater range of plants which may be used in addition to those shown under Group A. Most of the material in this part of the list is not adapted for use in the extreme northern section of the seacoast.

Plate XXVIII

Plate XXVIII. This open allee is framed on either side by a solid row of closely sheared thorn trees. Its formal lines are softened by the row of pink flowering dogwoods which add a charm of flowers in early spring and of fruit in the late fall. Thorns planted 4 to 5 feet apart and dogwoods 8 feet apart. Width between rows of thorns 22 feet and between rows of dogwoods 9 to 10 feet. (See pages 144 and 147, group XVI-D-b)

Plate XXIXB Plants Hardy in the Less Severe Seaside Exposure 47

Plate XXIX. An open allee 12 feet wide and 800 feet long, developed by the use of white birch planted 3 to 4 feet apart in each row. For a permanent allee of this type the birch is not ideal because of its short-lived characteristics and susceptibility to borer. Thorns, or the European beech would be preferable. (See page 147, group XVI-D-b-I) a. Deciduous trees:

Acer ginnale Siberian Maple

Amelanchier oblongifolia Shad-bush

Celtis occidentalis Nettle Tree

Crataegus coccinea Scarlet-fruited Thorn

Crataegus cordata Washington Thorn

Crataegus crus-galli Cockspur Thorn

Crataegus oxycantha May Thorn

Gleditsia triacanthos Honey Locust

Platanus occidentalis American Plane

Populus alba pyramidalis Bolle's Poplar

Prunus pumila

Sand Cherry Ptelea trifoliata

Hop Tree

Robinia pseudacacia

Black Locust Salix pentandra

Laurel-leaved Willow

Salix vitellina aurea Golden-barked Willow b. Conifers:

Juniperus sabina (in variety)

Savin Juniper Pinus densiflora

Japanese Red Pine

Pinus nigra austriaca Austrian Pine

Pinus sylvestris Scotch Pine c. Shrubs:

Calluna vulgaris

Scotch Heather Clethra alnifolia

Sweet Pepper Bush Cornus amomum

Silky Dogwood Cytisus scoparius

Scotch Broom

Dirca palustris Leather-wood

Genista tinctoria Dyer's Greenweed

Hibiscus syriacus Rose of Sharon

Hydrangea (in variety)

Hydrangea Hypericum kalmianum

Kalm's St. John's Wort ltea virginica Virginian Willow

Lycium chinense Chinese Matrimony Vine

Rhodotypos kerrioides White Kerria

Rhus copallina

Shining Sumac Robinia hispida

Rose Acacia

Rosa blanda Meadow Rose

Rosa Carolina Carolina Rose

Rosa multiflora. Japanese Climbing Rose

Rosa nitida

Shining-leaved Rose Rosa spinosissima

Scotch Rose Rubus odoratus

Flowering Raspberry Symphoricarpos vulgaris

Indian Currant

Viburnum lentago Sheep Berry