GRE 



G R E 



Tn Green-Houses of modern construction, 

 in order to have as much glass as possible 

 in front, the piers between the sashes are com- 

 monly of timber only, from six to eight or ten 

 inches thick, according to the height, so as to 

 admit as great a portion of light and heat of the 

 sun as possible, and the roofs wholly of glazed 

 frame-work. 



Green-Houses for large collections of plants 

 have sometimes two wings, of smaller dimen- 

 sions, added to the main building, one at each 

 end, in a right line, separated sometimes from 

 it by a glass partition, with sliding sashes for 

 communication, and the front almost wholly 

 glass-work, and half or whole glass roofs. Thus 

 by these additional wings, the houses consist of 

 three divisions, w hereby the different qualities and 

 temperatures of the various plants can be more 

 eligibly suited. The middle or main divi- 

 sion may be for all the principal and more hardy, 

 woody, or shrubby kinds, which require protec- 

 tion only from frost ; one of the wings appro- 

 priated to the succulent tribe ; and the other 

 to the more tender kinds that require occasional 

 heat in winter, but which can live without the 

 heat of a stove. 



On whatever plans Green-Houses are con- 

 structed, the whole of the inside walls should 

 be neatly finished off with plaster and white- 

 wash, and the wood-work painted white ; the 

 bottom being paved with large square paving 

 tiles, or some other similar material. 



In the Green-House there should be stands, 

 frames, or tressels, which may be moved in and 

 out, upon which rows of planks may be fixed, so 

 as to place the pots or tubs of plants in regular 

 rows one above another ; by which their heads 

 may be so situated, as not to interfere with each 

 other. The lowest row of plants next the win- 

 dows being placed about four feet from them, 

 that there may be a convenient breadth left to 

 walk in front ; and the rows of plants should 

 rise gradually from the first, in such a manner 

 that the heads of the second row be entirely ad- 

 vanced above the first, the stems only being 

 hid ; and at the back of the house a space al- 

 lowed of at least five feet, for the conveniency 

 of watering the plants, and to admit a current 

 of air round them, that the damps occasioned by 

 their perspiration may be the better dissipated ; 

 which by being pent in too closely often oc- 

 casion a mouldiness upon the tender shoots 

 and leaves, and when the house is close shut 

 up, this stagnating rancid vapour is often 

 very destructive ; for which reason they should 

 never be crowded too close to each other, nor 

 should succulent plants ever be placed among 

 them. 



Tn the annexed plate is the plan and elevation 

 of an improved Green-House, in which fig. 1. 

 is the front elevation, fig. 2. the ground plan, 

 fig. 3. a section. 



GREEN-HOUSE PLANTS, such as require 

 the protection of this sort of building during the 

 winter or other season : the following are the 

 principal of the different sorts that require this 

 sort of management. 



~SUCCULENT KtND. 



Agave, Agave or Ameriam Aloe, comprising 

 Common great American Agave, with entire green 

 leaves, and a branching flower-stalk. — Com- 

 mon Agave,with striped leaves. — Virginia Agave, 

 with narrower pale-green leaves. 



Aloe, African Aloe, containing Mitre-shap- 

 ed Aloe — Tree, or Sword Aloe — Aloe Ferox — 

 Fan Aloe — Succotorine Aloe — Soap Aloe — Par- 

 tridge - breast Aloe — Tongue Aloe — Warted- 

 Tongue Aloe— Pearl-Tongue Aloe — Cobweb 

 Aloe — Hedge-hog Aloe — Cushion Aloe — Spiral 

 Aloe — Pentangular Spiral Aloe — Triangular Spi- 

 ral Aloe — Iris Uvaria Aloe. 



Anthericum, Spia 'er-wort, containing Shrub- 

 by-stalked, Onion-leaved Anthericum — Aloe- 

 leaved Anthericum — Mock Asphodel Antheri- 

 cum. 



Caealia, Foreign Colts-Foot, comprising Ca- 

 calia Ficoides — Kleinia, or Indian Caealia — 

 Anteuphorbium Caealia — Papillary Caealia. 



Cactus, Melon Thistle, containing Cactus 

 Opuntia, or Common Indian Fig. 



Cotyledon, Navel-iuort, containing Round- 

 leaved — Long-leaved — Hemispherical-leaved. 



Crassula, Lesser Orpine, containing several 

 species. 



Euphorbia, Euphorlium, containing most of 

 the sorts. 



Mesembryanthemum, Fig Marigold, con- 

 taining many curious species. 



Sempervivum, Live Ever, or House-Leek, 

 containing Tree House-Leek — Variegated Tree 

 House-Leek— Lesser Canary-Tree House-Leek. 



HERBACEOUS KIND. 



Antholyza, Ethiopian Corn- Flag, containing 

 Ringent Scarlet Antholyza — ^Ethiopian Crim- 

 son Antholyza — Cunonia, or Large Spathed 

 Scarlet- Flowered. 



Antirrhinum, Snap-Dragon, containing Va- 

 riegated Snap - Dragon — Gibraltar Spotted- 

 Flowered Linaria— Dalmatian Toad-Flax. 



Aristolochia, Birth-wort, containing Ever- 

 green Aristolochia — Pistolochia, or Small Birth- 

 wort. 



Bryonia, Bryony, containing African Tuber- 

 ous-rooted Bryony. 



Calla, Calla, containing Sweet Calla, or 

 Ethiopian Arum. 



