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Trees and Shrubs for Flowering Effects: Hydrangea
Astilbe japonica Japanese Astilbe Catalpa (in variety) Indian Bean Cladrastis lutea Yellow-wood Cornus alba sibirica Siberian Dogwood Cornus paniculata Grey Dogwood Diervilla hybrida Hybrid Weigela Hydrangea arborescens sterilis Hills of Snow Kalmia latifolia Mountain Laurel Koelreuteria paniculata Varnish Tree Ligustrum ibota Japanese Privet Philadelphus (in variety) Mock Orange Rhododendron catawbiense hybridum Hybrid Rhododendron Rhus cotinus Smoke Bush Robinia pseudacacia Black Locust Viburnum cassinoides Roses (in variety) Roses Rubus deliciosus Rocky Mountain Flowering Raspberry Sambucus canadensis American Elder Spiraea salicifolia Meadow-sweet Syringa japonica Tree Lilac Viburnum carlesi Korean Viburnum Withe-rod Viburnum dentatum Arrow-wood Viburnum lentago Sheep Berry Viburnum opulus High-bush Cranberry Viburnum sieboldi Siebold's Viburnum Xanthoceras sorbifolia Chinese Flowering Chestnut D. PRODUCING FLOWERS DURING LATE SUMMER AND EARLY AUTUMN. There are comparatively few trees and shrubs which produce an interesting flowering effect during the late summer months and during the early autumn. This group is composed of those plants whose flowers are effective in the landscape.
Baccharis halimifolia Groundsel Bush Buddleia veitchiana Summer Lilac Clethra alnifolia Sweet Pepper Bush Elsholtzia stauntoni Elsholtzia Hamamelis virginiana Witch Hazel Hibiscus syriacus Rose of Sharon Hydrangea arborescens Wild Hydrangea Hydrangea paniculata Panicled Hydrangea Hydrangea paniculata grandiflora Large-flowered Hydrangea Hypericum (in variety) St. John's Wort Lespedeza japonicum White-flowering Desmodium Lespedeza sieboldi Siebold's Desmodium Oxydendrum arboreum Sourwood Potentilla fruticosa Shrubby Cinquefoil Sorbaria arborea glabrata Chinese Mountain Ash Spirea Spiraea billardi Billiard's Spirea Spiraea bumalda anthony waterer Crimson Spirea Spiraea callosa alba Fortune's White Spirea Stewartia pentagyna Alleghany Stewartia Tamarix (in variety) Tamarisk Vitex agnus-castus Chaste Tree E. PRODUCING FLOWERS IN SHADES OF RED AND PINK. In the development of interesting colour combinations for the flowers in landscape planting some definite association of colour schemes should be listed to assist one more readily in the selection of plants for varying colour effects. All plants in the following group produce flowers in shades of red and pink. The early-flowering sorts are shown in Group a and the late spring and summer-flowering sorts are shown in Group b. a.

Early-flowering sorts:
Azalea nudiflora Pinkster Flower Azalea vaseyi Carolina Azalea Cercis canadensis Red-bud Cornus florida rubra Red-flowering Dogwood Kalmia angustifolia Sheep Laurel Magnolia soulangeana Soulange's Magnolia Prunus besseyi Western Sand Cherry Prunus japonica (in variety) Flowering Almond Prunus persica vulgaris Common Peach Prunus subhirtella (in variety) Japanese Flowering Cherry Prunus tomentosa Japanese Plum Pyrus angustifolia Narrow-leaved Crab Pyrus coronaria Wild Crab Pyrus floribunda Flowering Crab Pyrus halliana parkmani Parkman's Crab Rhodora canadensis Rhodora b. Late spring and summer-flowering sorts:
Deutzia rosea Dwarf Pink Deutzia Diervilla florida Rose-coloured Weigela Kalmia latifolia Mountain Laurel Pyrus ioensis bechteli Bechtel's Crab Roses (in variety) Roses Spiraea bumalda anthony waterer Crimson Spirea Spiraea tomentosa Hardhack F. PRODUCING YELLOW FLOWERS. Until the trees and shrubs producing yellow flowers are grouped the reader can hardly appreciate how great is the wealth of this material. The group is divided, as are the preceding groups in the chapter, into the early-flowering types and the late-flowering types. a. Early-flowering sorts:
Benzoin aestivale Spice Bush Berberis (in variety) Barberry Cornus mas Cornelian Cherry Corylopsis pauciflora Japanese Flowering Hazel Cytisus scoparius Scotch Broom Elaeagnus angustifolia Russian Olive Elaeagnus longipes Japanese Oleaster Forsythia (in variety) Golden Bell Hamamelis japonica Japanese Witch Hazel Jasminum nudiflorum Naked-flowered Jasmine Lonicera fragrantissima Early Fragrant Honeysuckle Ribes aureum Flowering Currant Salix caprea b. Late spring and summer-flowering sorts:
Azalea lutea Flame-coloured Azalea Caragana arborescens Siberian Pea Shrub Colutea arborescens Bladder Senna Genista tinctoria Goat Willow Salix discolor Pussy Willow Koelreuteria paniculata Varnish Tree Laburnum vulgare Golden Chain Potentilla fruticosa Shrubby Cinquefoil Dyer's Greenweed Hypericum (in variety) St. John's Wort Kerria japonica Globe Flower Sophora japonica Japanese Pagoda Tree Rosa foetida (variety harisoni) Harrison's Yellow Rose Rosa hugonis Father Hugo's Rose G. PRODUCING WHITE FLOWERS. This group of plants is subdivided in the same way as are the two preceding groups, and consists only of those plants producing white flowers in sufficient quantity and size to be an effective element in the landscape planting. a.
Early-flowering sorts:
Azalea viscosa Lonicera tatarica alba Swamp Azalea Chionanthus virginica White Fringe Cornus (in variety) Dogwood Crataegus (in variety) Thorn Halesia carolina Silver Bell Lonicera morrowi Japanese Bush Honeysuckle White Tartarian Honeysuckle Magnolia stellata Starry Magnolia Prunus (in variety) Plum Spiraea arguta Hybrid Snow Garland Spiraea vanhouttei Van Houtte's Bridal Wreath Viburnum (in variety) Viburnum b. Late spring and summer-flowering sorts:
Dwarf Horse-chestnut Aesculus parviflora Cladrastis lutea Yellow-wood Clethra alnifolia Sweet Pepper Bush Deutzia (in variety) Deutzia Hydrangea (in variety) Hydrangea Ligustrum (in variety) Privet Philadelphus (in variety) Mock Orange Physocarpus opulifolius Ninebark PLATE XXIV. An interior view of a pleached allee eight years after transplanting. Note the spacing of the larger plants of the European cork maple at intervals of three feet, with "fillers" between each two of the larger trees. Compare with Plate No. XXVII on page 175 for the exterior view. Openings have been cut in the top of this allee to produce interesting spots of sunlight on the walk. (See page 146, group XVI-D-a, also frontispiece) PLATE XXV. An excellent illustration of pleasing garden formality filled with boxwood hedges, as edgings for carpet plantings of Japanese spurge, and accented with specimens of California privet neatly trimmed in a pyramidal form to represent boxwood. (See pages 124 and 145, groups XII-B and XVI-B) Rhododendron (white) Rhododendron Rhodotypos kerrioides White Kerria Robinia pseudacacia Black Locust Rosa alba White-flowered Rose Rosa lucida alba White-flowered Glossy Rose Rosa multiflora Japanese Climbing Rose Rosa spinosissima Scotch Rose Sambucus canadensis American Elder Sambucus racemosa Red-berried Elder Spiraea prunifolia Bridal Wreath Stewartia pentagyna Alleghany Stewartia H. PRODUCING BLUE FLOWERS. The group of plants producing blue flowers is extremely limited. A few plants which are shown in this list are extremely interesting for their flowering effect and with the exception of the rose of Sharon and the lilac, many of them are seldom used.
