PLANTS FOR WINDOW GARDENING. 59 



others. Second, those with large, round leaves, and large 

 showy, often coarse, flowers, as the various varieties of Tro- 

 pceolum majus. Third, those with small, delicate, regu- 

 larly-formed flowers, with smaller leaves, and more of climb- 

 ing rather than trailing habit, such as T. Lobbianum. 

 We are aware that this division is imperfect; that some 

 varieties partake of the characteristics of more than one 

 class, and that others are with difficulty included in any of 

 the three ; and to any one acquainted with all the different 

 varieties, the difficulty of classification will be at once 

 apparent. We shall, therefore, only attempt this general 

 division ; leaving a particular description to be given when 

 we treat of each variety. The soil to be used in the culture 

 of the tropaeolum is, for the bulbous varieties, leaf-mould 

 and peat, with an admixture of fine sand ; for the other 

 classes, an addition of more sand is to be advised, as care 

 must be taken not to enrich the soil too highly, for in a rich 

 soil, with plenty of room to develop the roots, the plants are 

 apt to run all to leaves. This may be prevented in two 

 ways, either by giving a poor soil, or by allowing the roots 

 to become " pot-bound," and nourishing the plant by slight 

 waterings of liquid manure ; they generally fail to give 

 satisfaction if the soil is close, heavy, and binding. All 



