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, Ipomcea coccinea, Michauxii, Horsfal- 

 lise, and rubrocoerulea. 



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, b for New Holland plants ; c 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 cases 



