BOTANICAL STRUCTURES. 285 
vation of the roof. Numerous varieties of this structure 
also have appeared, and some most sumptuous examples 
have been erected in the gardens of the opulent. With 
similar restrictions as in the green-house, the conservatory 
may be said to be capable of assuming any form. Orna- 
mental climbing plants are generally trained under the 
rafters, with a fine effect; such as Passiflora kermisina, 
Dolichos lignosus, Ipomma coccinea, Michauxii, Horsfal- 
liz, and rubroceerulea. 
The Plant-Stove may either be a dry-stove or a bark- 
stove, or both combined, and is applied to the cultivation 
of tropical plants which require an elevated temperature. 
The dry-stove may be considered as a green-house, having 
a larger than usual apparatus for the production of heat. 
The bark-stove is furnished somewhat in the manner of a 
pinery, with a receptacle to contain a bed of fermenting 
tanners’ bark, into which the pots are plunged. In this 
country, stoves are regarded as belonging rather to the 
botanic than to the flower garden: they are extremely use- 
ful, however, in the latter; for, besides presenting the florist 
with many unusual forms of vegetation, they afford in sum- 
mer a variety of beautiful plants, which, as they come into 
bloom, may be introduced into the cooler green-house or 
conservatory, and remain there till the flowering season be 
over. 
Sometimes the various botanical structures are combined 
into one imposing assemblage, as that exhibited in Fig. 21 ; 
a being a palm-house, 4 for New Holland plants; ¢ large 
green-house, and the intermediate space being occupied by 
dry-stove, heath-house, and green-houses. This mode is, 
of course, suited only for places of the first order, where 
‘splendor is an object, where everything is on a great scale, 
and expense little regarded. In a vast proportion of cages 
