EOS 



[ 790 ] 



ROY 



erature is at 50 or above, to give as 

 much air as possible ; and this may 

 even be done when a gentle fire is 

 going. 



Diseases. See Exlravasaled Sup and 

 Mildew. 



Insects. See Aphis, Anisopia, and 

 Tortrix. 



BOSK ACACIA, Hobi'nia hi'spida. 



KOSE APPLE. Jambo'sa. 



ROSE BAY. Epilo'binmanyiixfijo'iiion. 



KOSE CAMPION. Ly'chnls. 



ROSEMARY. Rosmari'nus officina'lis. 



Varieties. There are three varieties 

 the green, golden-striped, and silver- 

 striped. The first is in general culti- 

 vation. 



Soil. It thrives best on a poor, light 

 soil mixed with old mortar, or other 

 calcareous matters. In such, or -when 

 the plants are self-raised on an old 

 wall, they will bea* our severest win- 

 ters ; but in a rich soil they lose much 

 of their aromatic nature, and perish in 

 frost. For the green variety, the situa- 

 tion may be open, but the other two, 

 being tender, require to be planted be- 

 neath a south wall, or in pots to be 

 sheltered in winter. 



Propagation is by cuttings and rooted 

 slips, during any of the spring months, 

 or by layers in the summer. But the 

 finest plants are raised by seed. By 

 layers, is the best mode of pro- 

 pagating the gold and silver- striped 

 varieties. Sowin March or early in April, 

 in drills half-an-inch deep and six inches 

 apart. The rooted slips, and the cut- 

 tings of the young shoots, must be from 

 five to seven inches long, and planted 

 in a shady border, in rows eight or ten 

 inches apart, previously removing the 

 leaves from the lower two-thirds of 

 their length. Layers may be formed 

 by cutting young branches half through 

 on their under side, and pegging them 

 down an inch or two below the surface; 

 they become established plants by au- 

 tumn. Water must be applied abun- 

 dantly at the time of planting, and oc- 

 casionally afterwards until established. 



ROSE OF HEAVEN. Ly'chnis Cce'li- 

 Ro'sa. 



ROSE OF JERICHO. Aiiasta'ticn. 



ROSE OF THE WORLD. Came' Ilia 

 Ro'sa m u'ndi. 



ROSE ROOT. Se'dum rhodi'ol</. 



ROSE SNOWBALL TKEE. Vibu'rnum 

 O'pulus ro'senm. 



ROSMARI'NUS. Rosemary. (Fromros, 

 dew, and marinvs, of the sea ; maritime 

 plants. Nat. ord., Lipirorts [Lamia- 

 cea?]. Linn., '2-Diandria, \-Mono<jynia.) 



See Rosemnry. Hardy evergreens, purple- 

 flowered, and natives of the south of Europe. 

 R. ojftcina'lin (shop). 4. February. 1548. 



fo'liis-argt'nleis (silver-leaved). 4. 



March. 1548. 



fo'liis-att'reis (golden-leaved). 12. 



February. 1548. 



latifo'lius (broad-leaved). 12. Fe- 

 bruary. 1548. 



ROTATION OF CROPS. There are three 

 circumstances to be regarded in regu- 

 lating the order in which crops should 

 follow each other: 1. Each crop should 

 be as dissimilar as possible from its 

 predecessor. 2. The exuviae of the 

 preceding crop should not be offensive 

 to its successor. .'5. A spindle-rooted 

 crop should succeed a fibrous-rooted 

 crop, or vice versa. 



RO'THIA. (Named after A. W. Rof/i, 

 a German botanist. Nat. ord., Legu- 

 minous Plants [Fabacese]. Linn., 1G- 

 Monadelphia (j-Decandria. ) 



Hardy trailing annual. Seeds, in a warm 

 border, in April. 

 R. trifolia'ta (three-leaflcted). 2. Sulphur. July. 



ROUGE PLANT. Bivi'na tincto'ria. 



ROXBU'RGHIA. (Named after Dr. 

 Roxburgh, once director of the Botanic 

 Garden, Calcutta. Nat. ord., Roxburgh- 

 worts [Roxburghiacere]. Linn., 8-Oct- 

 andria \-Monoyynia.) 



Stove twining plants, with stems one hun- 

 dred fathoms long in the hottest parts of India, 

 where the roots are candied with sugar and 

 taken with tea. Propagated generally by suck- 

 ers ; sandy fibry loam, and a little leaf-mould, 

 and the usual plant-stove temperature. 

 R. gloriosoides (Gloriosa-like). 6. Pink, yel- 

 low. July. 1803. 



viridiflo'ra (green-flowered). Green. August. 

 1830. 



ROYAL BAY. La'urus iio'bilis. 



ROYE'NA. (Named after A. Van 

 Royen, a Dutch botanist. Nat. ord., 

 Ebunads [Ebenaceae]. Linn., U)-Dcc- 

 andria 2-ZHgynia. Allied to Diospy- 

 ros.) 



Greenhouse evergreen shrubs, from the Cape 

 of Good Hope, all but one white-flowered. 

 Cuttings of half-ripe shoots, in sand, under a 

 bell-glass, in April or May? sandy loum and 



