| 3 
96 ‘CLIMBING PLANTS. 
liable to be attacked by the red spider. Many of the shrubby climb- 
ers may be treated as annuals, and raised from seed every year in 
January, and planted out in June; but they do still better treated as 
biennials, and sown one year to flower the next. | 
All the most beautiful hot-house climbers, such as the Alifhenda 
eathartica, the Ipomea Horsfalliz, Petreea volubilis, &c., may be 
grown in the open air, by keeping their roots in heat; that is to say, 
if the roots are grown in a stove, or in a pit heated by hot water or 
flues to stove-heat, the stems may be brought through some opening 
purposely contrived, and twined over a trellis inthe open garden. A 
very striking effect may be thus produced by having a bed heated by 
hot-water pipes concealed under ground, at the foot of a veranda, 
over which these beautiful tropie _...«nbers may be trained. © 
> 
_ 
