EOS 



[ 705 ] 



BOY 



occupy, so as when the plants are ready 

 for the show, these appliances may he 

 removed, and the plant still preserve a 

 round and uniform appearance. It is 

 necessary at all times, when the tem- 

 perature is at 50 or above, to give as 

 much air as possible ; and this may even 

 he done when a gentle fire is going. 



Diseases. See EXTRAVASATED SAP, 

 GREEN CENTBE, and MILDEW. 



Insects. See APHIS, ANISOPIA, and 



TORTRIX. 



ROSE ACACIA. Robi'nia hi'spida. 



EOSE APPLE. Jambo'sa. 



ROSE BAY. Epilo'bium angustifo'lium. 



EOSE CAMPION. Ly'chnis. 



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 bear our severest winters; but 

 in a rich soil they lose much of their 

 aromatic nature, and perish in frost. 

 For the green variety, the situation may 

 be open ; but the other two, being tender, 

 require to be planted beneath 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 propagating the gold 

 and silver - striped varieties. Sow in 

 March, or early in April, in drills half an 

 inch deep and six inches apart. The 

 rooted slips, and the cuttings 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 autumn. Water must be ap- 

 plied abundantly at the time of planting, 

 and occasionally afterwards until estab- 

 lished. 



ROSE OF HEAVEN. Ly'chnis coe'li-ro'sa. 



ROSE OF JERICHO. Anasta'tica. 



ROSE OF THE WOELD. Camellia Ja- 

 po'nica ro'sa-mu'ndi. 



ROSE ROOT. Se'dum rhodi'ola. 

 45 



ROSE SNOWBALL -TREE. 

 o'pulus ro'seum. 



ROSMARI'NUS. Rosemary. (Frpm ros, 

 dew, and marinus, of the sea ; maritime- 

 plants. Nat. ord., Lipworts [Lamiacese]. 

 Linn., 2-Diandria 1- Monogynia.} 



Hardy evergreens, purple -flowered, and natives 



of the south of Europe. See ROSEMARY. 



JR. officina'lis (shop). 4. February. 1548. 



fo'liis-arge'nteis (silver-leaved). 4. Mardi- 



1548. 



fo'liis-au'reis (golden-leaved). 12. Fe- 

 bruary. 1548. 



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



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 pre- 

 decessor. 2. The exuvise of the preced- 

 ing crop should not be offensive to its 

 successor. 3. A spindle - rooted crop 

 should succeed a fibrous-rooted crop, or 

 vice versd. 



RO'THIA. (Named after A. W. Roth, 

 a German botanist. Nat. ord., Legumi- 

 nous Plants [Fabacese]. Linn., 16-Mona- 

 delphia 6-Decandria.) 



Hardy trailing annual. Seeds in a warm border, 

 in April. 

 R. trifolia'ta (three-leafleted). r 2. Sulphur. July, 



ROUGE PLANT. Rivi'na tincto'ria. 



ROXBU'RGHIA. (Named after Dr. 

 Roxburgh, once director of the Botani& 

 Garden, Calcutta. Nat. ord., Roxburgh- 

 worls [Roxburghiacese]. Linn., S-Oct- 

 andria l-Monogynia.) 



Stove twining plants, with stems one hundred 

 fathoms long in the hottest parts of India, where 

 the roots are candied with sugar, and taken with 

 tea. Propagated generally by suckers; sandy, 

 fibry loam, and a little leaf-mould, and the usual 

 plant-stove temperature. 



R. gloriosoi'des (gloriosa-like). 6. Pink, yellow. 

 July. 1803. 



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



1836. 



ROYAL BAY. Lau'rus no'bilis. 



ROYE'NA. (Named after A. Van Roy en, 

 a Dutch botanist. Nat. ord., Ebenads 

 [Ebenaceffi]. Linn., IQ-Decandria 2- 

 Digynia. Allied to Dyospyros.) 



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 loam and fibry peat. Win- 

 ter temp., 40 to 48 ; summer, 60 to 76. 

 R. gla'bra (smooth). 4. September. 1731. 



hirsu'ta (h&irj -leaved). 7 > Purple. July. 1752. 



latifo'lia (broad-leaved). 5. June. 1816. 



lu'cida (shining-/eocd). 4. May. 16QO. 

 ROY'LEA. (Named after ProfessorRoyle* 



