This section is from the book "Handbook Of Hardy Trees, Shrubs, And Herbaceous Plants", by W. Botting Hemsley. Also available from Amazon: Handbook of hardy trees, shrubs, and herbaceous plants.
There are many beautiful and interesting shrubs, some of which are not included in either of the foregoing divisions, that may be successfully cultivated with a little additional care in winter. Many of them do not, it is true, require any covering, or even the protection afforded by a wall, in the milder parts of the kingdom, except during unusually severe weather. But as a rule they must be planted in warm well-drained soil, and, beyond the districts named, they will need the protection of a south wall, and in some cases extra covering in winter. Amongst the erect tender shrubs frequently met with we may enumerate : Euonymus Japonicus varieties, Photinia spp., Arbutus Andrachne, etc., Pittosporum spp, Myrtle, Elae agnus Japonicus varieties, Escallonia spp., Bupleurum fruti-cosum, and Osmanthus - with more or less ornamental foliage; and Hydrangea spp. and, varieties Magnolia grandiflora, Cornus (Benthamia) fragifera, Viburnum spp., Buddleya Lindleyana, and Spiraea Lindleyana - with conspicuous flowers or fruits. Tender shrubs requiring support as well as protection are equally numerous. The following are some of the more familiar species: Lonicera spp., Bignonia spp., Jasminum revolutura, etc., Fuchsia macrostema varieties, Berberidopsis corallina, Lapageria rosea, Philesia buxifolia, Stauntonia lati-folia, Lardizabala biternata, Akebia quinata, etc. The foregoing list might be extended almost indefinitely, especially if made applicable to the colder parts of the kingdom. Further remarks relative to the hardiness of plants will be found under the head of General Observations. Amongst dwarf, trailing, or creeping shrubs suitable for covering banks, rock-work, etc., we may mention the genera Vinca, Helianthemum, Cotoneaster, Polygala, Rosa, Erica, and Clematis.