WALLS 
iqq 
a wall. Amongst such plants there may be mentioned, as growing 
on the walls at Kew, the myrtle, the olive, the pomegranate, the 
kaki, and the loquat. Others, although quite hardy, need the heat 
and ripening influence of a south, east, or west wall to make them 
blossom. 
At Kew, where plants are grown that come from nearly every 
latitude between the Antarctic and the Arctic circles, there is a con- 
siderable group of plants too tender to succeed out-of-doors entirely, 
but not tender enough to need greenhouse protection all the year 
round. Some of these can be cultivated in pots, placed outside in 
summer, and taken under cover in winter. But a better plan for 
many, because they can be planted out in permanence, is to give 
them a place on a wall. The old walls at Kew, their colour mellowed 
by the rain, sun, and frost of a hundred years, shelter a number 
of interesting and beautiful shrubs. They are arranged in no par- 
ticular order. As a vacancy occurs it is filled up by the most suit- 
able plant that is available. Here may be seen the blue-flowered 
Ceanothus from California ; the Escallonia from Chile ; the Pitto- 
sporum from New Zealand ; the Chinese quince, the loquat, and 
the kaki from China and Japan ; some of the tender plants of 
South Europe and the Mediterranean region ; and others from the 
Himalaya, Mexico, Brazil, Peru, and Australia. Many of them 
are of great age, and others among the latest acquisitions to 
European gardens. 
