CONSERVATIVE WALLS. 
63 
tliat demand no protection. The recesses are capable of being covered in cold 
weather with glazed sashes, which can be placed out of sight in a moment, when- 
ever it is safe to remove them, by sliding them behind the other divisions. In these 
recesses, the tenderest greenhouse plants may be cultivated, and trained against a 
trellis which could not be shown in the engraving. Thus are combined a handsome 
architectural elevation, and the means of having some of the finest exotic plants 
exposed in summer, without danger, and in a condition incomparably more healthy 
and attractive than they ever attain in the greenhouse. 
If the employment of glazed sashes be deemed too expensive, canvas or other 
screens can readily be substituted for them by the same contrivance ; but then the 
plants will be sure to suffer from being kept in darkness during winter, and the 
aspect of such coverings will be by no means pleasing at that season and in spring. 
Where it is thought preferable, too. another set of rails, on the outside of those for 
the sashes, can be prepared, in order to carry some kind of covering, which may be 
used in rigorous weather. Sliould this provision be made, the necessity for flues 
and fire-heat will be very trifling, and they might, in fact, be altogether dispensed 
with. Fires are only useful to prevent the plants from being frozen; and when this 
can be done by a more natural method, they become worse than useless for such 
exotics as can be cultivated against a conservative wall. 
For the benefit of persons preparing such a wall as that we have described, we 
subjoin brief and very select lists of the plants best adapted for each of the different 
compartments. We shall insert the names in alphabetical order, and refer, for the 
character of the species, to any botanical catalogue. 
CLIMBERS THAT WILL GROAV AGAINST THE UNPROTECTED PART OF THE WALL. 
Acacia dealbata 
Alstroemeria acutifolia 
— hirtella 
Ampelopsis liederacea 
Apios tuberosa 
Aristolochia Sipho 
Caprifolium dioicum 
— etruscum 
— pubescens 
— sempervirens and its varieties 
Ceanothus azureus 
— collinus 
Cereis Siliquastrura 
Chimonanthus fx'agx^ans and its varieties 
Clematis azui'ea 
— florida 
— montana 
— Sieboldii 
— viticella 
— — plena 
Convolvulus bryoni^efolius 
Crataegus Pyracantha 
Cydonia japonica and its varieties 
Deutzia scabra 
Eriobotrya japonica 
Erythrina Crista-galli 
Grevillea rosmarinifolia 
Jasminura officinale and varieties 
Kerrya japonica flore-pleno 
Leycesteria formosa 
Magnolia conspicua 
— grandiflora 
Mahonia aquifolium 
Mimosa marginata 
Mutisia ilicifolia 
Myrtus communis and varieties 
Passiflora cserulea and varieties 
Punica granatum and varieties 
Ribes sanguineum 
Solanum crispum 
Sollya heterophylla 
Tecoma radicans 
— — major 
— grandiflora 
Wistaria sinensis 
With roses of various kinds. 
