BOTANICAL STRUCTURES. 287 
economy must be studied; and in villa gardens the orna- 
mental plant-house is very often attached to the library or 
the drawing-room, or has .a covered communication from 
these apartments. A good plan for such a glazed house 
may be found inthe Gardener's Magazine, vol. vi., p. 
664. 
’ Green-house Plants:—This beautiful class of plants has 
become so numerous that in a sketch like the present it is 
impossible to give the names-of even a limited selection. 
We may once more refer’ to Mr. Loudon’s tables in his 
Encyclopedia of Horticulture, or to his still more copious 
lists in the Hortus Britannicus, from both of which works 
much valuable information on the subject: may be obtained. 
The recent increase of species makes the task of selection 
at once more necessary and more difficult; and it is one 
which, it must be confessed, is often negligently performed. 
Many of the finer sorts of woody plants are not propagated 
without difficulty, and, consequently, being high-priced in 
the nurseries, are found in requisite abundance only where 
there is great liberality on the part of the proprietor. On 
the other hand, the species which strike easily are circula- 
ted by gardeners themselves, many of whom, by their own 
interest and resources, more than half fill their green-houses 
without calling for the pecuniary aid of their employers. 
To this cause may be ‘ascribed the perpetiation of many 
mean-looking planta, which, if hardy, would scarcely: be 
tolerated in well-kept shrubberies, and ceatainly ought not 
to encumber the green-house. we Ls be 
Light mould produced by the rotting of turf taken from 
pastures, and mized with sand, if necessary, or enriched by 
the addition of leaf-mould, is well adapted for most grécn- 
house plants. Some require a mixture of peat-earth’; 
others thrive only in pure sandy peat. a more specific 
