ROCAMBOLE 



749 



RODGERSIA 



R. Pseu'daca'cia au'rea (golden). Leaves yellow. 

 ,, bessonia'na (Bessonian). Branches stout in a 



compact bead. 1878. 

 cri'spa (curled). 40. June. 

 , decaisnta'na (Decaisnean). 30. Bright pink. 1863. 

 decaisnea'na flo're ru'bro (red-flowered). Rose. 



1890. 



fastigia'ta (erect). Branches erect. 

 flo're-lu'Uo (yeUow-flowered). 40. Yellow. May. 

 inSrmis (unarmed). 40. May. 

 latisi'liqua (broad- podded). 30. May. 



ropky'lla (large- leafleted). 30. May. 

 tnicrophy'lla (small-leafleted). 30. May. 



ntonof>hy'lla (one-leaved). Leaves reduced to one 

 leaflet. 



monophy'lla fastigia'ta (erect). Branches erect. 

 monophy'lla pe'ndula (drooping). A weeping 



monslro'sa (monstrous). 30. White, red. May. 

 pe'ndula (drooping). 30. Pink. May. 

 pro'cera (taU). 30. White, red. May. 

 semperflo'rcns (ever-flowering). 20. White. 

 Summer. 



sophorafo'lia (Sophora-leaved). 30. White, red. 

 May. 



specta'bilis (showy). 30. May. France. 

 stri'cta (upright). 30. White, red. May. 

 tortuo'sa (twisted). 40. May. 



ulricia'na (Ulrician). Branches arching and 

 pendulous. 1900. 



umbraculi'fera (umbrella-bearing). 40. May. 

 purpu'rea (purple). 15. Purple. July. N. Amer. 



1 8 10. Stove evergreen. 

 ro'sea (rosy). See R. HISPIDA ROSEA. 

 se'pium (hedge). See LONCHOCARPUS SEPTUM. 

 seri'cea. (silky). See LONCHOCARPUS SERICEUS. 

 sophorezfo'lia (Sophora-leaved). See R. PSEUDACACIA 



SOPHORjBFOLIA. 



squama'ta (scaly). See BRONGNIARTIA ROBINIOIDES. 



stri'cta (upright). See R. PSEUDACACIA STRICTA. 

 tomento'sa (felted). See CARAGANA FRUTESCENS. 

 triflo'ra (three-flowered). See HALIMODENDRON 



ARGENTEUM. 



vesica'ria (bladdery). See SESBANIA PLATYCARPA. 

 viola' 'cea (violet). See LONCHOCARPUS VIOLACEUS. 

 visco'sa (clammy). 30. Purple. July. 1797. 

 " Clammy Locust." 



ROCAMBOLE (A' Ilium Scorodo'prasum), sometimes 

 called Spanish Garlic, has its bulbs or cloves growing in 

 a cluster. The stem bears many bulbs at its summit, 

 which, as well as those of the root, are much milder 

 than Garlic. 



It is best propagated by the root bulbs, those of the 

 stem being slower in production. Plant either in 

 February, March, or early in April, as well as through- 

 out the autumn, in drills, or by the dibble, in rows 

 6 inches apart each way, and usually 2 inches within the 

 ground, though the plants would thrive better if grown 

 on the surface, as recommended for the Eschallot. In 

 other respects they are cultivated as directed for Garlic. 

 A very small bed is sufficient for the supply of the 

 largest family. 



EO'CHEA. (Named after La Roche, a botanical 

 author. Nat. ord. Houseleeks [Crassulaceae]. Linn. 5- 

 Pentandria, s-Pentagynia. Allied to Crassula.) 



Greenhouse evergreen succulents, from South Africa. 

 For culture, see CRA'SSULA. 

 R. albiflo'ra (white-flowered). See CRASSULA ALBIFLORA. 



bi'color (two-coloured). See R. ODORATISSIMA. 



biconve'xa (doubly-convex). J. White. July. 1823. 



capita' ta (headed). White. July. 1822. 



cocci'nea (scarlet), i. Scarlet. July. 1710. 



flo're~a'lbo( white-flowering), i. White. July. x8ii. 



,, cymo'sa (cymed). See CRASSULA CYMOSA. 



falca'ta (sickle-leaved). See CRASSULA FALCATA. 

 fla'va (yellow). See CRASSULA FLAVA. 



jasmi'nea (jasmine-like), j. White. April. 1815. 



me'dia (mediate). See R. VERSICOLOR. 



odorali' ssima, (sweetest-scented), i. Pink. June. 

 1793. 



perfolia'ta (leaf-stem-piercedV See CRASSULA PER- 

 FOLIATA. 



tiniflo'ra (Tinus-flowered). White. 1861. 



versi' color (changeable-coloured). 2. White. May. 

 1 8 10. 



ROCHE LIA. (A commemorative name. Nat. ord. 

 Boraginacea?.) 



Hardy perennial herb. Seeds; divisions. Ordinary 

 soil. 

 R. sUllttla'ta (starry). J. Blue. June. Europe. 1799. 



ROCK CARROT. Moni'zia edu'lis. 



ROCK CRESS. A'rabis. 



ROCK CRESS, PURPLE. Aubrie'tiaaeltoi'dea. 



ROCKET. He'speris matrona'lis. 



ROCKET LARKSPUR. Delphi' ni*m A ja'cis. 



ROCK LYCHNIS. Visca'ria. 



ROCK ROSE. Ci'stus. 



ROCK TOBACCO. Primuli'na Taba'cum. 



ROCK-WORK is one of the most difficult things to 

 construct tastefully. If the body of the rock is intended 

 to be raised much above the ground level, a quantity 

 of soil and rubbish should be carried into the centre of 

 the space. This soil, besides serving to support the 

 rock-work, will also form a border for the plants to 

 grow in. Having at hand plenty of large, rough stones, 

 broken bricks, or stony rubbish of any kind or colour, 

 proceed with these to imitate the form of natural rock 

 as nearly as possible. Rough, bold, angular projections 

 and deeply-formed chasms, are the principal features in 

 natural scenery which please us most. A rock, with a 

 flat unbroken surface, whether horizontal or perpen- 

 dicular, presents too much sameness to be pleasing to 

 the eye ; therefore, in imitating nature, the projections 

 should be varied and bold, and unless raggedness and 

 intricacy form principal features in its composition, it 

 will lose much of its effect. If the rock-work be on a 

 large scale, it should not be one continued line, but 

 broken at intervals, in one part lost beneath the surface 

 of the earth, and again rising in another part and re- 

 suming its sinuous form. 



So far there is little difference between this and the 

 common method of making artificial rock. When, how- 

 ever, every stone has been arranged to suit the eye, 

 the interstices between them are to be filled up with any 

 kind of rough mortar. Of course, fissures, and similar 

 places intended for the plants which are to cover the 

 rock, must be left open, so that the roots may penetrate 

 to the soil beneath the stones. The next operation is to 

 daub the whole mass over with Roman cement. For 

 this purpose the latter should be mixed with water 

 until it is of the consistence of thick paint, in which 

 state it may be applied to the stones with a large painter's 

 brush. The spaces between the stones having been filled 

 with rough mortar prevents the cement from being 

 wasted The thickness of the latter on the stones need 

 not be more than the eighth of an inch : it will unite 

 the whole into one mass; and rock-work thus con- 

 structed is, beyond all comparison, far more natural 

 than that made in the usual way. It has none of that 

 disjointed appearance which usually accompanies rock- 

 ' work made without cement. After a few months' ex- 

 posure to the weather, rock-work thus formed (if skilfully 

 made) cannot, without careful examination, be dis- 

 tinguished from a natural mass ; it will soon cover all 

 but the most prominent parts. If the cement be of a 

 colour too light, which for some situations may be the 

 i case, a little lamp-black or soot may be mixed with it. 

 i Care must, however, be taken that no substance which 

 may make the cement more porous is used, otherwise it 

 will peel from the stones after a hard frost. For the 

 benefit of those who are not accustomed to using cement, 

 ' we may mention that no more should be moistened at 

 once than can be used in a short time. If the cement 

 j be good it will quickly harden, and will then be in a 

 manner useless. 



In making artificial rock for waterfalls, or other con- 

 structions, where the cement may be constantly exposed 

 to the action of the water, the best water-cement should 

 be used. Any preparation that does not quickly indurate 

 under water will, in a short time, be washed away, and 

 leave nothing but the bare stones. Whatdey. 



RODGE RSIA. (Commemorative of Admiral Rodgers 

 of the U.S. Navy, who was commander of the expedition, 

 when R. podopkylla was discovered. Nat. ord. Saxi- 

 fragacea>. Allied to Saxifraga.) 



