AN ENCYCLOPEDIA OF HORTICULTURE. 



333 



RudbecMa continued. 



1803. See Fig. 397. (B. M. 2310 ; S. E. B. 38.) SYN. Lepaehyt 

 pinnata. 



R. purpurea (purple).* This is the correct name of the plant 

 described in this work as Echinacea pvarpvrea. See Fig. 398. 



R, speciosa (showy). JL-head* 2iin. to 4in. across; ray florets 

 orange-coloured, contrasting well with the black-purple disk. 

 Summer, L, lowest ones ovate, strongly ribbed, coarsely toothed, 

 borne on slender stalks 6in. to 9in. long ; succeeding ones gradu- 

 ally becoming narrower; uppermost ones sessile. Stems freely 

 branched below, A. 2ft. to 3ft. A fine plant (G. C. n. s., 

 xvi. 373.) ST7. R. Neizmanii. 



R. triloba (three-lobed). jl. -heads small, but numerous and showy ; 

 ray florets eight, yellow, |in. long ; disk blackish-purple. August. 

 1., upper ones ovate-lanceolate, sparingly toothed, the lower ones 

 three-lobed, tapering at the base, coarsely serrate ; those from 

 the root pinnately parted or undivided A. 2ft to 5ft 1699. 

 Plant hairy, much-branched. (B. E. 525.) 



RUDDLES. An old name for Marigolds. 



RUDERAL. Growing in waste places or amongst 

 rubbish. 



RUDGEA (named in honour of Edward Bodge, an 

 English botanist, who published in 1606 "Plantarum 

 Guianae Icones"). OKD. Rubiacece. A genus comprising 

 about forty-five species of glabrous or pubescent, stove 

 shrubs or small trees, natives of tropical America. 

 Flowers mediocre or rather large, paniculate, sessile or 

 pedicellate, rarely capitate; calyx tube ovoid or ob- 

 conical ; limb of five, rarely four, persistent segments or 

 parts ; corolla cylindrical or funnel-shaped, the tube 

 usually straight and elongated, the throat naked or 

 bearded, the limb of five, rarely four, erect or spreading 

 lobes ; stamens five, or rarely four. Leaves opposite, 

 sub-sessile or petiolate, coriaceous; stipules often carti- 

 laginous, sometimes thickly coriaceous and inflated. For 

 culture of the species best known in gardens, see 

 Coffea. 



R. macrophylla (large-leaved), fl. cream-colour, sessile ; fascicles 

 densely clustered in globose heads; corolla segments obtuse; 

 peduncles short Summer. L large, sub-sessile, obovate-oblong, 

 narrowed at base. A. 6ft Brazil, 1867. (B. M. 5653; F. d. . 

 1720 ; G. C. n. s., xiL 8L) 



RUDIMENTARY. Imperfectly developed; incom- 

 plete. 



RUDOLFHIA (named after Charles Asmund Rudolph, 

 1771-1832, a botanist of Jena). OED. Leguminosae. A 

 genus comprising two or three species of handsome, stove, 

 twining herbs, confined to St. Dominga. Flowers red, 

 elongated, fasciculate - racemose on axillary peduncles ; 

 calyx tubular, the two upper lobes connate, the lateral 

 ones smaller; standard oblong, erect, inappendiculate ; 

 bracts and bracteoles small, narrow. Leaves one-foliolate, 

 stipellate. The two species described below are probably 

 not in cultivation. 



R. rosea (rose-coloured). JL scarlet, iin. long, in pedunculate 

 racemes. June. Pods pubescent I., leaflet ovate -oblong, 

 glabrous, acuminated. Branches smooth, glabrous. 1826. 



R. volnbilis (twining)t Jl. scarlet, liin. long ; racemes bearing 

 flowers from the base. July. I. glabrous, cordate-ovate, acumi- 

 nate. Branches dotted from tubercles. 1820. 



RUDOLFHXEMERIA. A synonym of Xniphofia 

 (which see). 



RUE (Ruta graveolens). A hardy evergreen, somewhat 

 shrubby plant, native of Southern Europe, cultivated in 

 gardens for its use medicinally ; the leaves emit a 

 powerful odour, and have an exceedingly acrid taste. 

 The plant grows almost anywhere, but thrives best in 

 a partially sheltered and dry situation. Propagation 

 may be effected by seeds, sown outside, in spring; and 

 by cuttings or rooted slips, taken at the same season, 

 and inserted for a time, until well rooted, in a shady 

 border. 



RUE, GOAT'S. See Galega officinalis. 



RUELLIA (named in honour of John Ruelle. of 

 Soissons. 1474-1537, botanist and physician to Francis I. ; 

 he published a treatise, "De Natnra Plantarum," in 1536). 



Ruellia continued. 



Including Arrhostoxylum, Dipteracanthus, and BtepTiano- 

 physum. OBD. AcanthaeecB. A genus comprising about 

 150 species of stove or greenhouse, pubescent, villous, 

 or rarely glabrous, annual or perennial herbs, sub-shrubs, 

 or shrubs, mostly American, a few being found in Africa, 

 Asia, and Australia. Flowers violet, pale lilac, white, 

 red, or rarely yellow or orange, sessile or sub-sessile in 

 the axils of the leaves or bracts, sometimes solitary or 

 fascicled, sometimes in paniculate cymes; calyx deeply 

 five-fid or five-parted; corolla tube straight, incurved, 

 or abruptly bent, dilated upwards; limb spreading, very 

 oblique or sub-equal, with five ovate or rounded, twisted 

 lobes ; stamens four, included or exserted. Leaves oppo- 

 site, entire or rarely toothed ; bracts often narrow or 

 small. The best - known species are described below. 

 They are pretty, free-flowering plants, and readily thrive 

 in any light, rich soil, with stove heat. Propagation 

 may be effected by cuttings, inserted in similar soil, 

 under a hand glass. 



R. acutangnla (acute-angled). /. sessile, on axillary peduncles, 

 4in. to 6in. long ; calyx iin. long ; corolla tube Iin. long, slightly 

 curved; limb bright orange-scarlet, yellow at the throat, 2in. 

 in diameter. May. L 5in. to Sin. long, elliptic-ovate, acuminate, 

 narrowed into the petiole, with many nerves sunk in the surface. 

 Branches obtusely quadrangular. Brazil A large herb or under- 

 shrub. (B. M. 6382.) 



R. Balkiei (Dr. Baikie's).* JL. opposite, sessile, in a terminal 

 panicle, composed of many-flowered, opposite racemes or spikes ; 

 corolla scarlet, over 2in. long, tutmlar-infundibuliform, inflated 

 or ventricose in the middle. Winter. '. in opposite pairs, 

 sometimes more than 9in. long, including the petiole, ovate- 

 lanceolate, acuminate, attenuated at base. A. 3ft West Africa, 

 1858. Sub-shrub. (B. M. 5111, under name of Stephanophygum 

 Baikiei.) 



R. ciliatiflora (fringe-flowered). /. purplish-blue, handsome, 

 two to four or six in a terminal, leafless panicle ; corolla Iin. 

 across, the tube about the same length ; margins of limb beauti- 

 fully dentate-ciliate. September. I. opposite, ovate, petiolate, 

 the margins unequally serrate, more or less hairy ; lower ones 

 more so, and the largest. Stem herbaceous, pubescent-scabrous. 

 A. 2ft Buenos Ayres, 1838. (B. M. 3718.) 



R. Devosiana (Devos'). jL white, axillary ; corolla tube sud- 

 denly dilated and bent at the middle. I. lanceolate, distantly 

 toothed, deep green above, with the course of the veins whitish, 

 entirely purple beneath. Stems purple. Brazil, 1877. Sub- 

 shrub. A very effective foliage plant. (B. H. 1877, 19.) 



R. elegans (elegant), of Hooker. A synonym of R. lattbrota. 



R. formosa (beautiful). Jl. on axillary, alternate, straight pe- 

 duncles, two or three times longer than the leaves ; corolla fine 

 scarlet, showy ; tube liin. long ; two upper lobes of limb con- 

 joined half-way up. Summer. I. opposite, ovate, more or less 

 pointed, round'ed at the base, covered on both sides with short 

 hairs ; petioles not half as long as the leaves. A. 2ft. Brazil, 

 1808. Shrub. (B. >L 1400.) 



R. Herbstii (Herbst's).* /. three to five together, Sin. long , 

 calyx red-purple, iin. long; corolla pale rose-purple, abruptly 

 bent ; limb of five white, patent or recurved, bilobed divisions. 

 September. 1. deep dull green, the upper ones of a dull pale 

 purple beneath, Sin. to 'iin. long, Ijin. to 2in. broad, lanceolate, 

 acuminate, obscurely sinuated, serrated. A. 3ft. Brazil, 1859. 

 An erect shrub or sub-shrub. (B. M. 5156, under name of 

 Dipteracanthw HerMii.) 



R. latebrosa (secret). JL, corolla salver-shaped; tube white, 

 purplish upwards, curved ; limb very bright blue, of five emargi- 

 nate lobes. Summer. L opposite, pubescent, ovate, acuminate, 

 coarsely serrated, tapering gradually into a footstalk nearly 

 equalling the leaf in length ; those at the tips of the branches 

 reduced to sessile bracts. A. 2ft East Indies, 1834. AnnuaL 

 (B. M. 3389, under name of H. elegant.) 



R. longifolia (long-leaved). Jl. vermilion; corolla segments 

 retuse. July. i. oblong-lanceolate or oblong, attenuated at both 

 ends, repand or repand-denticulate. A. 2ft to 3ft Brazil, 

 1820. A glabrous, perennial herb. 



R. macrantha (large-flowered). JL of a rosy-purple colour, with 

 a light, beauti ully-veined throat, trumpet-shaped, large, axillary. 

 L long-lanceolate. 1883. A handsome, decorative shrub. (B- H. 

 1881, p. 410.) 



R. macrophylla (large-leaved).* JL handsome, sub-secund, in 

 spreading, di-trichotomous panicles ; corolla bright scarlet, 2in. to 

 3in. long, the tube curved, broader upwards, but laterally com- 

 pressed ; limb large ; lobes soon reflexed. Summer. L opposite, 

 petiolate, ovate, acuminate, penninerved, reticulated, the mar- 

 gins sinuated or indistinctly toothed, puberulous. A. 3ft to 4ft 

 New Grenada, Mexico, Ac., 1844. Plant shrubby below, her- 

 baceous above. (B. M. 4448 and B. B. xxxii. 7, under name of 

 Stemanaeanthut macrophylliu.) 



