310 



The Dictionary of Gardening, 



Robinia — continued. 



thickly beset with short prickles, l, leaflets ovate, h. 25ft. 



Hybrid tree. 



R. hispida (hispid).* /?. deep rose-colour, large, inodorous, in 

 loose ami iiMially pfiidulmis racemes. May and June. Pods 

 i;;l;indular-liispid. L, It-atiets eleven to eighteen, smooth, ovate or 

 ol)long-nvate, rounded or slightly cordate at base, tipped with a 

 long bristle. Branches and stalks more or less biistly. h. 3ft. to 

 8ft. North America, 1743. Shrub or small tree. See Fig. 382. 

 (B. M. 311.) 



A common name for 







Fig. 382. Flowering Bdanch ok Robinu hispiua. 



R. h. macrophylla (large-leaved). /., leaflets large, ovate- 

 roundish. Branches and peduncles glabrous, without prickles. 

 h. 10ft. An ornamental variety. 



R. jubata (bearded). A synonym of Cctraijana jubata. 



R. Fseudacacia.* Bastard Acacia ; False Acacia ; Common 

 Locust. Jt. white, fragrant, in slender, loose, pendulous racemes. 

 Sin. to 5in. long ; calyx spotted. April and May. Pods smooth. 

 l.t leaflets nine to seventeen, oblong-ovate or elliptical. Branches 

 naked, h. 30ft. to 60ft. North America, 1610. A tree, with 

 hard and durable wood. There are many varieties of this species 

 in English gardens. 



R. P. Bessoniana (Besson's).* Branches thornless. This 

 variety forms a compact, round-headed tree. 



R, P. crispa (curled). I., leaflets all, or lor the most part, un- 

 dulately curled. Ii. 40ft. 



R. P. Decaisneana (Decaisne's). A. bright rosy-pink. (E. H. 



1863, p. 151.) 



R. P. fastigiata (pyramidal). A form w ith a habit similar to that 



of the Lomliiirdy Pnj)lar. 

 R. P. inermis (unarmed). A small-gr'owing, round-headed bush. 



It is usually grafted on tall stems of the common type. 



R. P. monophylla (one-leaved). L reduced to a single leaflet. 



R. P. semperflorens (ever-flowering). This variety continues 

 flowering tlirouj;hout the summer. (R. H. 1875, 191.) 



R. P. sophorsefolia (Sophora-leaved). (. large, somewhat re- 

 sembling those of Sophora japonica. h. 25ft. 



R. P. strlcta (upright). This has the general tendency to grow 

 upright, l)ut the plant is not as fastigiate as the Lombardy 

 Poplar, h. 30ft. 



R. P. tortuosa (twisted). Ji., racemes similar to those of the 

 type, but smaller and fewer-flowered. Branches curiously twisted. 

 h. 40ft. 



R. P. umbraculifera (umbrella-bearing). L, leaflets ovate. 



Branches much crowded, smooth. Head orbicular, k. 40ft. 



Other forms of Ii. Paeudacacia are ; macrnjthiilla, leaves long, 

 and leaflets broad; microphylla, leaves small, and leaflets narrow ; 

 mongtrosa^ leaves large and twisted ; penduta, shoots slightly 

 drooping ; proccra, tall, and vigorous-growing ; spectabilin, leaves 

 large, shoots straight and vigorous. 



R. viscosa (clammy).* /. rose-colour, crowded into roundish, 

 erect racemes, nearly inodorous. Way and June. Pods glandular- 

 viscid. L, leaflets eleven to fifteen, ovate and oblong, obtuse or 

 slightly cordate at the base, paler and pubescent beneath, tipped 

 with a short bristle. Branches, petioles, ic, glandular-viscid. 

 h. 20ft. to 40ft. North America, 1797. Tree. (B. JI. 560, under 

 name of Ii. glutinona.) Ii. hella-rosea is either a form of this 

 species, without the characteristic viscidity, or a hybrid between 

 it and R. Ptfeudacacia. 



synonym of Saccolabinm 



KOBIN'S PINCUSHION. 



the Rose Bedeguar. 



ROBIQUETIA. A 



(which f^ee.) 



ROCAMBOIiE {Allium Scorodoprasum). A hardy 

 perennial, cultivated for the use of its bulbs in a. some- 

 what similar way to those of Garlic. Increase is effected 

 by dividing the bulbs which form, annually, at the root, 

 and also on the tops of the stems. When 

 separated singly, these should be planted, at 

 the end of February or in March, Sin. apart 

 and about 2in. deep. So soon as the leaves 

 decay, lift and dry the bulbs in the sun ; they 

 will then be ready for storing for future use. 



KOCHEA (named in honour of M. de la 

 Roche, a French botanist). Stn. Ealosanthes. 

 Ord. Crassulacece. A small genus (about four 

 species) of small, greenhouse, shrubby succu- 

 lents, confined to South Africa. Flowers white, 

 yellow, pink, or scarlet, rather large, aggre- 

 gated in corymbose-capitate cymes ; calyx five- 

 parted or five-fid ; corolla salver-shaped, its tube 

 longer than the calyx, the limb five - parted, 

 spreading ; stamens five, included. Leaves 

 opposite, connate at base, oblong, obovate, or 

 lanceolate. For culture, see Crassula. 



R. coccinea (scarlet). This is the correct name of 

 the plant describetl in this work as Craavula coccinea. 

 R. jasxninea (Jasmine-like). This is the correct name 

 of the plant described in this work as Cra&sula jas- 

 /niiiea. 

 R, odoratlssima (very fragrant). /. pale yellow 

 or creamy - white, sometimes rosy, sweet - scented, 

 about lin. long ; limb of the petals lanceolate ; cymes many- 

 flowered. June. /. erecto-patent, linear-lanceolate or subulate, 

 lin. to liin. long, taper-pointed. Stem erect, 1ft. to lUt. high, 

 scabrous, much-branched or nearly simple. 1793. Syn.' CroiH-ula 

 odoratisuma (A. B. R. 26). 

 R. versicolor (various-coloured). This is the correct name of 

 the plant described in this work as Cragsula versicolor. 



ROCHELIA. 



(which see). 



KOCK BEAUTY. A common name for Draba 

 pyre}iaica. 



ROCK BRAEB. See Crypto^amme. 



ROCK CRESS. See Arabis. 



ROCK CRESS, PURPLE. A common name for 

 Aubrietia deltoidec put'purea. 



ROCKERIES. Where alpines and perennials are 

 cultivated in any great quantity, it is essential that some 

 sort of a Rockery should be provided for the accommo- 

 dation of the rarer and dwarf-growing species. It may 

 be on a small or an unlimited scale, according to the 

 extent of the collection ; in any case, this style of 

 gardening affords very great interest, especially when 

 the plants can be induced to succeed. Besides alpines 

 and dwarf perennials, there are numerous other sub- 

 jects that may often be appropriately introduced, such 

 as hardy Ferns, Yuccas, compact-growing shrubs. Juni- 

 pers, hardy Heaths, &c. When constructing a Kockery, 

 the principal object should be to provide situations, and 

 allow sufficient space amongst the stones for the plants 

 to grow. The outline or shape can be formed by 

 building up such ordinary soil as may be at command ; 

 the stones can then be embedded over any part of the 

 surface desired, and a new compost added at the time 

 the plants are arranged and inserted. Rockwork is 

 generally constructed of stone, if this is procurable ; but 

 frequently other substitutes, such as old bricks, clinkers, 

 &c., have to be utilised. Little can be said respecting 

 the proper arrangement, as this varies, in almost every 

 individual case, to suit the situation, plants available, and 

 the surroundings. A background of some sort is desirable, 

 for affording shelter and protection from cutting winds ; 



A synonym of Echinospermum 



