See Fig
366. (P. M. B. i. 101; R. S. H. vi., under name of R. Campbelliae.) This species has been largely used for hybridising purposes; many of its progeny, however, are early-flowering, and liable to be injured by spring frosts. Some of them are mentioned herewith: R. altaclerense (B. M. 3423), R. Russellianum (S. B. F. G. ser. ii. 91), R. Smithii (S. B. F. G. ser. ii. 50), R. undulatum (S. B. F. G. ser. ii. 341), R. venustum (S. B. F. G. ser. ii. 288). The following are varieties:
R. a. album (white). fl. white, with some purple dots above on the inside. l. ferruginous beneath. (B. M. 3290; B. R. 1684.) R. a. cinnamomeum (cinnamon-leaved). fl. white, with purple and yellow spots. l. cinnamon-coloured beneath. (B. R. 1982.) R. a. c. roseum (rosy). A splendid sub-variety, having rose-coloured flowers 2 1/2in. in diameter. (B. M. 3825.) R. a. limbatum (bordered). fl., corolla limb rose-colour, gradually fading into an almost pure white throat, marked at the base with a deep blood-red blotch, broad. Half-hardy. (B. M. 5311.) R. a. puniceum (purple). fl. either purplish or of an intense red-scarlet colour; corolla segments sub-bilobed at apex, crenate, sub-undulated. l. covered below with velvety-silvery, adpressed pubescence. (B. R. 890 and H. E. F. 168, under name of R. arboreum.) R. a. roseum (rosy). fl. rose-colour. l. ferruginous beneath. (B. R. 1240; S. B. F. G. ser. ii. 339.) R. argenteum (silvery). A synonym of R. grande.
R. Aucklandii (Lord Auckland's).* fl. the largest of the genus; calyx platter-shaped, 1 1/2in. in diameter; corolla firm, rather fleshy, pure white, tinged with pink, veiny; tube short, yellowish and rose-coloured towards the base; limb spreading, 3in. to 5in. in diameter; peduncles longer than the petioles, red or green. May. l. variable in size and breadth, 4in. to 10in. long, coriaceous, oblong-elliptical, scarcely approaching to lanceolate, acute, cordate at base, full green above, paler below; petioles 2in. long. Branches sub-erect, copiously leafy. h. 4ft. to 8ft. Sikkim, 1850. (R. S. H. xi.) SYN. R. Griffithianum Aucklandii (B. M. 5065).
R. barbatum (bearded). fl. deep puce or blood-colour, moderate-sized, collected into a compact, globose head, 4in. to 5in. in diameter; calyx large, scarcely silky, deeply cut into five leaf-like lobes 1/2in. long. l., when young, sparingly hairy and ciliated; adults 5in. to 7in. long, 1 1/2in. to 2in. or more wide, elliptic-lanceolate, acute, rather broader above the middle; margins reflexed and rough with hard ciliae; petioles 1/2in. long, slightly tubercled, and beset with long, rigid, black setae or hairs, which often extend a little way up the midrib beneath. Main trunks few, clothed with reddish bark; branches numerous. h. 40ft. to 60ft. Sikkim, 1829. Half-hardy tree. (F. d. S. 469; R. S. H. 3.) R. b. Smithii (Smith's). A variety differing from the type in having the under surface of the leaves furfuraceous sub-tomentose. SYN. R. Smithii (B. M. 5120).
R. blandfordiaeflorum (Blandfordia-flowered).* fl. often green before expansion, afterwards becoming more or less of a cinnabar or brick-red or orange-red on the upper part of the tube and limb, sometimes altogether green, at others red, even in the bud; corolla 1in. to 2 1/2in. long; stamens ten; heads five to ten-flowered. l. 2in. to 3in. long, coriaceous in luxuriant plants, lanceolate, acuminate, shortly petiolate, ferruginously lepidoted beneath. Branchlets slender, twiggy, lepidoted. h. 8ft. Himalayas, 1851. (B. M. 4930.) R. Boothii (Booth's). fl. yellow, campanulate, disposed in many-flowered corymbs; calyx leaf-like, membranous, the segments oval, obtuse, glabrous. l. thickly coriaceous, rhomboid, ovate, acuminate, 4in. to 5in. long, 2in. to 2 1/2in. broad, scaly beneath, densely ciliated on the margins. h. 5ft. to 6ft. Bhotan. This is found growing as an epiphyte on Oak-trees in its native place. (I. H. 1858, 174.) R. Brookeanum (Sir James Brooke's). fl. many, in a large, loose, terminal umbel, on rather short peduncles; calyx absent; corolla full orange or golden-tawny, between bell and funnel-shaped, large, thick, with an elongated tube and a limb of five crisped lobes; stamens ten, as long as the tube. April. l. 6in. to 9in. long, firm, oblong-lanceolate, acute, full green above, the same or a little paler beneath, and there sparingly dotted with minute scales; petioles dark purple, very short, broad, and thick. Branches dark purple, stout. Borneo, 1848. Stove epiphytal or terrestrial shrub. (B. M. 4935; F. d. S. v. 480; G. C. 1871, 236.) R. B. gracilis (slender).* fl. pale yellow, freely produced on young plants in trusses of ten to twelve. l. light green, ellipticlanceolate. 1871. (J. H. S. iii. 85.) R. californicum (Californian). fl. many, in terminal umbels; calyx small, slightly pilose; corolla rose-purple, broadly campanulate, the lobes yellow-spotted within, and undulated; stamens ten, shorter than the corolla. June. l. somewhat obovate-elliptic, coriaceous, acute, glabrous, shortly petiolate, one-coloured, paler beneath. h. 3ft to 8ft. California. Hardy. (B. M. 4863.) R. calophyllum (beautiful-leaved).* fl. in corymbs of four or five, on short, scaly peduncles; calyx very scaly, short, five-lobed; corolla pure white, slightly tinged with yellow-green, 3in. long and broad, tubular-campanulate, somewhat ringent, deeply five-lobed; stamens eighteen to twenty, included. May. l. 3in. to 5in. long, firm, rigid, coriaceous, ovate, oblong, or somewhat elliptical, dark glossy-green, obtuse at base, very acute at apex, glaucous beneath when young, ferruginous when old, with innumerable scales. Branches spreading, stout, terete. h. 3ft Bhotan. (B. M. 5002.) R. camelliaeflorum (Camellia-flowered). fl. solitary or twin, on short, curved peduncles; calyx segments thick, obtuse; corolla pure white, with a faint rosy tinge, rather thick, lepidoted, 1 1/2in. across. April. l. at the tips of the branches, differing in little but size from those of R. Maddeni, 2 1/2 in. to 3in. long. Stems 2ft. to 6ft. long, seldom thicker than a goose-quill. Branches long, generally pendulous. Sikkim, 1851. (B. M. 4932; R. S. H. xxviii.) R. campanulatum (bell-flowered).* fl. pale lilac, with a few purple spots, or rose-colour, corymbose; calyx lobes very short; corolla campanulate, about 2in. in diameter, with flat, entire lobes, rounded at the apex; pedicels glabrous. April. l. elliptic, mucronate, obtuse or sub-cordate at base, below greyish-powdery, above, as well as the petioles and branchlets, glabrous. h. 4ft. Sikkim, 1825. Half-hardy. (B. M. 3759; L. B. C. 1944; P. M. B. xvi. 193; S. B. F. G. ser. ii. 241.) SYN. R. aeruginosum (R. S. H. xxii.). R. c. aeruginosum (verdigris-coloured). A form having the under surface of the leaves clothed with verdigris-coloured tomentum.
R. c. Batemani (Bateman's). A larger-flowered, more robust-habited form. (B. M. 5387.) R. c. Wallichii (Wallich's). fl., corolla more brightly coloured than in the type. l. elliptic or oblong, loosely tomentose beneath, often caducous; petioles densely woolly. (R. S. H. v.) R. campylocarpum (curved-fruited).* fl. honey-scented, horizontal and nodding, six to eight in a terminal head, on slender pedicels; calyx five-lobed, glandulose; corolla tinged of a sulphur hue, and always spotless, truly campanulate, nearly 2in. long, broader across the five spreading lobes, which are finely veined. June. Capsules curling upwards. l. coriaceous, but not thick, 2in. to 3 1/2in. long, 1 3/4in. to 2in. broad, cordate at base, rounded and mucronate at the apex, on slender petioles 3/4in. long. Ultimate branchlets, as well as the peduncles and pedicels, glandular-pilose. h. 6ft. Sikkim, 1851. A twiggy, branched bush. (B. M. 4968; R. S. H. xxx.) R. catawbiense (Catawban). fl. lilac-purple; calyx lobes small; corolla broadly campanulate; pedicels (and capsule) rusty-pubescent. July. l. oval or oblong, rounded at both ends, smooth, 3in. to 5in. long, pale beneath. h. 3ft. to 6ft. Mountains of Southern United States, 1809. Hardy. (B. M. 1671.) R. caucasicum (Caucasian).* fl. corymbose; corolla rose-coloured outside, white within, spotted with green at the throat, campanulate-infundibuliform. August. l. lanceolate, ovate, or nearly obovate, slenderly veined above, beneath clothed with much-adpressed, ferruginous tomentum, the margins revolute. Stems diffuse or decumbent. h. 1ft. Caucasus, 1803. Hardy. (B. M. 1145.) The following are handsome varieties of this species: R. c. albiflorum (white-flowered). A hybrid with white flowers, not so desirable as the type. (B. M. 3811, under name of R. c. hybridum.) R. c. flavidum (yellowish-flowered). fl. straw-colour, spotted with green. R. c. Nobleanum (Noble's). fl. of an intense rose-colour both outside and within. l. oblong.
R. c. pulcherrimum (very pretty). fl. rose-colour. l. oblong. A pretty hybrid between R. arboreum and R. caucasicum. (B. R. 1820, under name of R. pulcherrimum.) R. c. stramineum (straw-coloured). fl. straw-colour, fulvous-spotted within. l. oblong. (B. M. 3422.) R. Chamaecistus (Chamaecistus). A synonym of Rhodothamnus Chamaecistus. R. Championi (Champion's). fl. white, tinged with delicate rose-colour, or white with the upper lip pale yellow towards the centre, and copiously dotted with ochre; calyx hispid, deeply cleft into four rather long segments; corolla 4in. across, the tube rather short, campanulate; stamens ten; umbels four to six-flowered; peduncles hispid. April. l. shortly petioled, lanceolate, shortly acuminate, reticulated, flat, dark green above, rusty beneath, where the margins, costa, and veins, are clothed with short, bristly hairs. H. 7ft. Hong Kong, 1881. (B. M. 4609.) R. ciliatum (ciliated).* fl. pale reddish-purple, inclined, in three to many-flowered, terminal heads; sepals veined, ciliated; corolla 1 1/2in. long, and nearly as much across; tube rather contracted below; limb of five lobes, the upper one obscurely spotted. May. l. elliptic, acuminate, coriaceous, 2in., rarely 3in., long, sometimes obscurely cordate at the base; upper surface (except in age) pilose, even villous when young; beneath quite glabrous, covered with minute, ferruginous scales. h. 2ft. Sikkim. A small, more or less pilose or setose, hardy, rigid species. (R. S. H. xxiv.) R. c. roseo-album (rose-and-white). fl. white, tinged with rose, larger than in the type. (B. M. 4648.) R. cinnabarinum (cinnabar-red).* fl. rather small, nodding, usually four to eight in a loose head; calyx segments of various sizes; corolla brownish-red, with a long tube; the lobes rounded, spreading, and slightly acuminated; stamens ten, included. April and May. l. ovate or oblong-lanceolate, acute at both ends, 2in. to 3in. long, 1in. wide, dull green above, ferruginous beneath. Branches slender. Sikkim, 1851. Half-hardy. (R. S. H. viii.) R. Roylei (R. S. H. vii.) is nearly allied to this.
R. citrinum (citron-coloured). fl. drooping, fragrant, rather small, umbellate; calyx shortly five-lobed; corolla pale lemon-colour, more than 3/4in. long, campanulate; limb of five nearly erect, retuse lobes; stamens five, included; anthers deep orange. May. l. on short petioles, spreading, the largest not more than 2in. long, elliptic-oblong, obtuse, glabrous, coriaceous, dark green above; beneath, paler, and dotted with minute, pale-greenish scales. Java, 1854. A small, stove species. (B. M. 4797.) R. Clivianum (Duchess of Northumberland's).* fl. white, slightly tinged with pale pink, especially on the margins; within, profusely dotted with light purplish-red. A hybrid, believed to have been produced between R. arboreum and R. catawbiense. It is a perfectly hardy, strong-growing plant, but is well worthy of protection while in flower. (B. M. 4478.) R. dahuricum (Dahurian).* fl. rose-coloured, solitary or in twos or threes at the tips of the branches, on short pedicels; calyx very shortly or scarcely five-toothed; corolla rotate-campanulate, not lepidoted. March. l. oval-oblong, mucronulate, glabrous, lepidoted, paler beneath, deciduous. h. 3ft. Dahuria, 1780. An erect, hardy species. See Fig. 367. (A. B. R. 4; B. M. 636; l. B. C. 1605.) R. d. sempervirens (evergreen). fl. of an intense purple. l. persistent, dark green. (B. M. 1888; B. R. 194, under name of R. d. atrovirens.) R. Dalhousiae (Lady Dalhousie's).* Epiphytal Rhododendron. fl. lemon-scented, three to seven in an umbellate head, the spread of which is greater than that of the leaves; calyx large, deeply divided into five foliaceous lobes; corolla white, with an occasional tinge of rose, 3 1/2in. to 4 1/2in. long, and as broad at the mouth, campanulate, much like that of Lilium candidum; lobes very broad, waved, spreading; stamens ten; peduncles stout, nearly 1/2in. long. April to July. l. few, patent or reflexed, petiolate, 4 1/2in. to 5in. long, elliptic-obovate, obtuse at base, attenuated below into a more or less downy footstalk about 1/2in. long, darkish-green, inclining to yellow above, beneath paler. Stems clothed with reddish, papery bark. Branches spreading, whorled. h. 6ft. to 8ft. Sikkim, 1850. A straggling, half-hardy epiphyte, especially found on Oaks and Magnolias. (B.M. 4718; F. d. S. 460; R. S. H. i. ii.) R. D. hybridum (hybrid). A hybrid between R. Dalhousiae and R. formosum. The flowers are as large as those of the former, but have derived a tinge of pink from R. formosum; the ciliated calyx also resembles that of the latter species, while the leaves are intermediate in size, and quite glabrous. (B. M. 5322.) R. Edgeworthii (Edgeworth's).* fl. showy, inclined; calyx large, of five deep, spreading, coloured lobes, very downy on the back, the edges finely ciliated; corolla white, often tinged with blush or pale yellow; tube rather short, widening much at the mouth; limb more than 4in. across, spreading, of five nearly equal lobes; stamens ten; peduncles terminal or axillary, usually two or three together. May and June. l. 2in. to 4in. long, ovate-lanceolate, acute or suddenly acuminate, obtuse at base, the margins recurved, the upper surface singularly wrinkled from impressed, reticulated veins; petioles about 3/4in. long. Sikkim, 1851. Shrub with straggling branches, often pendulous upon trees and rocks. The flowers are so fragrant that a few are sufficient to scent a large room. (B. M. 4936; F. d. S. 797-8; R. S. H. xxi.) R. eximium (choice). A synonym of R. Falconeri.
R. Falconeri (Dr. Falconer's).* fl. white, numerous, rather small densely placed in small, globose heads; calyx very minute corolla of ten rounded lobes; peduncles erect, elongated after flowering. May. l. very coriaceous, 8in. to 12in. long, 5in. to 7in. wide; upper side glossy-green, fading to yellow on the margins, which are quite plane; beneath, except on the midrib and reticulated veins, clothed with short, dense, pale ferruginous down; young leaves velvety-downy. Trunks two or three from the same point, often 2ft. in diameter. h. 30ft. Sikkim, 1850. Half-hardy tree. (B. M. 4924; F. d. S. 477-80; R. S. H. x.) SYN. R. eximium.
R. Farrerae (Mrs. Farrer's). fl. of a pale lilac-rose colour, terminal; calyx very shortly five-lobed; corolla campanulate, the lobes spreading and undulated. March. l. coriaceous, ovate, obtuse, mucronulate, slightly attenuated at base, reticulate-veined, hairy on both sides, the margins slightly recurved and ciliated; petioles, as well as the branchlets, villous-pilose. h. 3ft. China, 1829. Hardy. (S. B. F. G. ser. ii. 95.) R. ferrugineum (rusty-leaved).* Alpine Rose. fl. of a beautiful scarlet colour, marked with ash-coloured or yellow dots, disposed in umbels; calyx lobes five, short, obtuse; corolla funnel-shaped. May to July. l. oblong, attenuated at both ends, glabrous and shining above, thickly beset with ferruginous dots beneath, and much resembling those of the Box-tree; when young, ciliated, with a few hairs beneath. h. 1ft. Europe, 1752. Hardy. (J. F. A. 255; L. B. C. 65.) R. f. albiflorum (white-flowered). A variety having white flowers. (S. B. F. G. ser. ii. 258, under name of R. f. album.) R. formosum (beautiful).* fl. few, terminal; calyx small, scarcely lobed; corolla white, slightly tinged with purple and yellow, large, sub-campanulate, with an angular tube. April. l. lanceo-late, obtuse, shining above, beneath (as well as the outside of the corolla) lepidote. Branches smooth. h. 3ft. to 8ft. Eastern Himalaya, 1815. (B. M. 4457.) R. Fortunel (Fortune's).* fl. pendulous, fragrant, loosely clustered in heads of eight to ten, on peduncles 1/2in. to 1in. long; calyx discoid, small; corolla of a fine pale rose-colour, shortly campanulate, 3in. to 5 1/2in. in diameter, with seven rounded lobes; stamens fourteen. May. l. 5in. to 7in. long, oblong or linear-oblong, acute, bright green, but opaque above, glaucous below, acute, rounded or cordate at base; petioles red-brown, 1/2in. to 1in. long. Branches very stout, terete. h. 12ft. China, 1859. Hardy. (B. M. 5596.) R. fulgens (brilliant). fl. on short pedicels, in dense heads; calyx obsolete or very short; corolla of a deep bright blood-red, somewhat fleshy, highly polished and shining, campanulate, with a slightly compressed tube, and a limb of five recurved lobes. June. l. broadly obovate or ovate-elliptic, rounded at apex, cordate at base, 4in. long, 3in. broad, tolerably constant, coriaceous, glossy above, densely woolly beneath, the margins recurved. h. 4ft. Eastern Himalaya, 1851. (B. M. 5317; F. d. S. 789; R. S. H. xxv.) R. glaucum (glaucous).* fl. erect or inclined; calyx deeply five-parted, with leafy lobes; corolla pale pinkish-purple, above 1in. long, and about as broad, with a campanulate tube and a moderately spreading limb of five emarginate lobes; stamens ten, included. May. l. rather crowded at the tips of the branches, 1in. to 3in. long, usually 1in. to 1 1/2in. broad, shortly petioled, oblong or broadly lanceolate, obtuse, with a mucro, when old naked above; below glaucous, almost white, and dotted with copious little scales, which abound on young leaves, bracts, buds, peduncles, and calyx segments. h. 2ft. Sikkim, 1850. Half-hardy. (B. M. 4721; F. d. S. 672; R. S. H. xvii.) R. grande (large).* fl. white, 2in. to 3in. long 2in. to 2 1/2in. in diameter; calyx very short, obscurely lobed; corolla limb of rather short segments; stamens ten; stigma swollen. March. l. obovate-oblong, acute, attenuated into the thick petioles, 6in. to 12in. long, 3in. to 5in. broad, nearly flat, glabrous, full green above, silvery-white beneath; when in bud, very beautiful, erect and silky, at first enveloped in large scales. Trunks solitary or two or three together, spreading, branched above. h. 30ft. Sikkim, 1850. Tree. SYN. R. argenteum (B. M. 5054; F. d. S. 473-6; R. S. H. ix.). R. Griffithianum Aucklandii (Griffith's, Lord Auckland's var.). A synonym of R. Aucklandii.
R. hirsutum (hairy).* Alpine Rose. fl. pale red or scarlet, disposed in umbellate corymbs; calyx lobes oblong, obtuse; corolla funnel-shaped, the outside, as well as the calyx, having resinous dots; pedicels bristly. May to July. l. sub-elliptic, rigid-ciliated, ferruginous-dotted beneath, glabrous on both sides. h. 1ft. to 2ft. South Europe, 1656. Hardy. (B. M. 1853; J. F. A. 98; L. B. C. 479.) R. Hodgsoni (Hodgson's). fl. delicate pale purple or rose-colour, in heads 4in. to 6in. diameter; calyx obsolete; corolla tube 1 1/2in. long, broadly campanulate; limb spreading, 2in. to 2 1/2in. across, eight-lobed; stamens sixteen to eighteen; anthers dark purple-brown. May and June. l. terminal on the ultimate branches, spreading, 1ft. to 1 1/2ft. long, oblong-elliptic, obovate or ovate-lanceolate, obtuse, nearly cordate at base, thickly coriaceous, glabrous and glossy-green above, the margins recurved; beneath, except the midrib, clothed with pale silvery-white, rarely ferruginous tomentum; petioles very stout, 1in. to 2in. or more long. Bark pale flesh-colour. h. 12ft. to 20ft. Eastern Himalaya, 1851. A small tree, branching from the base. (B. M. 5552; R. S. H. xv.) R. Hookeri (Hooker's).* fl. red, in many-flowered corymbs; calyx ample, campanulate, obsoletely lobed; corolla campanulate, with five deeply bilobed lobes; stamens ten. April. l. coriaceous, highly glabrous, rigid, oblong-oval, obtuse, long-stalked, rounded at base, glaucescent beneath, 3in. to 5 1/2in. long, 1in. to 1 1/2in. broad; nerves furfuraceous-pubescent; petioles thick, 1in. long. h. 12ft. to 14ft. Bhotan. An erect species. (B. M. 4926.) R. jasminiflorum (Jasmine-flowered).* fl. many, in terminal umbels; calyx obscurely five-lobed; corolla white, slightly tinged with rose below the limb; tube 2in. long, straight, scarcely gibbous at the base; limb spreading, of five obovate wavy lobes; stamens ten; anthers red. May. l. crowded towards the tips of the branches; lowermost ones sub-verticillate on short petioles, obovate-oblong, rather acute, glabrous, nearly coriaceous. h. 2ft. Malacca, 1849. (B. M. 4524; L. & P. F. G. i. 70.) R. javanicum (Javan).* fl. fascicled, eight to twelve or more, large and handsome; calyx very small, five-lobed; corolla orange-coloured, with scattered red spots, between funnel and bellshaped; tube gradually widening upwards into a limb of five nearly equal lobes; stamens ten, slightly ascendent; anthers dark purple. All seasons. l. scattered, oblong-oval, or approaching obovate, acute, tapering into a short petiole, naked above, beneath minutely dotted with very small, brown, peltate scales. Branches spreading. h. 4ft. Java, 1847. (B. M. 4336; P. M. B. xv. 217.) R. Jenkinsii (Jenkins'). fl. white, four to six in a corymb; calyx segments short; corolla lobes sub-equal, rounded, obtuse; style very long. l. shortly petioled, oblong-lanceolate, acute, cuneate at base, 4in. to 5 1/2in. long, 1in. to 1 1/2in. broad, glaucous and densely scaly beneath. h. 6ft. to 7ft. Bhotan. (R. G. ix. 277.) R. kamtschaticum (Kamtschatka). fl., calyx lobes oblong, leaf-like; corolla purplish-red, striped inside with dark purple, nearly 1 1/2in. in diameter, the lobes obtuse and not callous at the apex. July. l. oval, slightly acute, reticulated, five-nerved, naked, ciliated. Kamtschatka, North America, &c., 1802. A procumbent, hardy sub-shrub. (L. & P. F. G. i. 22, under name of Rhodothamnus kamptschaticus.) R. Kendrickii latifolium (Kendrick's broad-leaved). fl. ten to fifteen in a rather loose, globose head; calyx of five small teeth; corolla bright scarlet, broadly campanulate, equally five-lobed; stamens ten. Spring. l. 4in. to 6in. long, about 1in. wide, generally undulated on the margins, more or less whorled, green on both surfaces; young ones (and other parts of the plant) clothed with reddish, glutinous hairs that disappear in age. Trunk 7in. to 8in. in girth. Bhotan, 1859. Hardy. (B. M. 5129.) R. Keysii (Keys'). fl. red, yellow, small, five or six in a corymb; calyx five-toothed; corolla tubular or urceolate, the lobes ovate, obtuse; stamens ten; filaments exserted. July. l. 2 1/2in. to 3in. long, about 1in. broad, ovate-lanceolate, acute, glabrous, glaucous and scaly beneath. h. 2ft. to 6ft. Bhotan, 1851. (B. M. 4875; F. d. S. 1110.) R. lanatum (woolly).* fl. rather large, inclined, in terminal corymbs of six to ten; calyx minute, five-toothed; corolla yellowish-white or pale sulphur-colour; tube broad-campanulate, within, above, and three of the upper lobes in part, red-dotted; limb 2in. to 2 1/2in. across, of five very spreading, entire lobes. June. l. at the tips of the branches, 3 1/2in. to 5in. long, about 2in. broad, obovate or elliptical, obtuse, shortly mucronate, rather acute, or at most obtuse, at the base; under surface, as well as ultimate branchlets, peduncles, and petioles, covered with adpressed, white or tawny, cottony tomentum. Trunk 6in. in diameter. Sikkim, 1851. A large shrub or small tree. (F. d. S. 684; R. S. H. xvi.) R. lapponicum (Lapland). fl. violet-purple, few in an umbel; corolla open bell-shaped, dotted, with a short tube and a rotate limb; stamens five to ten. July. l. elliptic, obtuse, 1/2in. long, rigid, persistent, and, as well as the branches, dotted with rusty scales. h. 6in. Arctic regions, 1825. Hardy, tufted shrub. (B. M. 3106.) R. lepidotum (scaly).* fl. on slender pedicels, 1 1/2in. to 2in. long; calyx lobes obtuse, somewhat leaf-like; corolla yellow or purple, 1in. across, lepidoted, especially on the outside of the tube; upper lobes spotted with green; anthers large, rich redbrown. May and June. l. obovate, lanceolate, or oblong, shortly apiculate, petiolate, pale green. h. 2ft. to 4ft. Sikkim, 1829. Half-hardy. (B. M. 4657; R. S. H. xxiii., under names of R. eloeagnoides and R. salignum.) R. l. chloranthum (yellow-flowered). fl. of a yellowish-green colour, with green spots. (B. M. 4802.) R. l. obovatum (obovate-leaved). fl. few, terminal; corolla maroon-purple, 1in. in diameter, salver-shaped; stamens usually eight, rarely ten. May. l. pale glaucous-green, 1/2in. to 1 1/2in. long, emitting a resinous odour, obovate. A stout or slender, twiggy shrub, forming extended clumps 1ft. to 4ft. high, branching from a woody, tortuous rootstock. (B. M. 6450.) R. Maddeni (Madden's).* fl., calyx always small, five-lobed; corolla pure white, with a faint blush, chiefly on the upper lobe, 3 1/2in. to 4in. long, and as much across; tube sparingly lepidoted, funnel-shaped; limb very large, spreading, of five rounded, entire lobes; stamens eighteen to twenty, as long as the tube; peduncles about three, short and stout. June to August. l. abundant, elliptic-lanceolate, acute or acuminate, 4in. to 7in. long, gradually tapering to rather short, ferruginous petioles, frequently pendulous; young ones entirely, perfect ones usually beneath only, clothed with dense, white squamules, which become ferruginous with age. h. 6ft. to 8ft. Sikkim, 1850. Half-hardy. (B. M. 4805; F. d. S. 912; R. S. H. xviii.) R. malayanum (Malayan). fl. nodding, 3/4in. long, in terminal, few-flowered umbels, on short, curved peduncles; calyx minute, five-toothed; corolla dull scarlet; tube 3/4in. long, gibbous at base; limb flat, horizontal, 1/3in. to 1/2in. across; stamens ten. Summer. l. 3in. to 4in. long, elliptic or elliptic-lanceolate, acute at both ends, coriaceous, narrowed into a petiole 1/3in. to 2/3in. long, dark green above, red-brown beneath. Branches red-brown. Branchlets, leaves beneath, petioles, pedicels, calyx, ovary, and corolla (sparingly), clothed, with red-brown, lepidote scales. Malayan Archipelago, 1854. A large, stove shrub or small tree. (B. M. 6045.) R. maximum (greatest). American Great Laurel. fl. on viscid pedicels; corolla pale rose-colour or nearly white, greenish in the throat on the upper side, and spotted with yellow or reddish, 1in. broad, campanulate. July. l. elliptic-oblong or lanceolate-oblong, 4in. to 10in. long, very thick acute, narrowed towards the base, very smooth, with somewhat revolute margins. h. 6ft. to 20ft. North America, 1756. Hardy shrub or tree. (B. M. 951.) R. m. hybridum (hybrid). fl. fragrant, often as large as those of R. ponticum; corolla pale purplish, with acute lobes. l. attenuated at base, scarcely glabrescent beneath. Garden hybrid. (B. M. 3454.) R. m. bigener (B. R. 195) is almost identical with this.
R. Metternichii (Metternich's).* fl. rose-coloured, sub-campanulate, disposed in corymbose heads. Spring. l. oblong or obovate-oblong, coriaceous, ferruginous-tomentose beneath. Japan, 1870. Hardy shrub. (S. Z. F. J. 9.) R. nilagericum (Neilgherries). fl. pink, in a large, terminal, capitate raceme; calyx small, very shortly five-lobed; corolla campanulate, the segments undulated, rounded, and bilobed. May. l. elliptic or oblong, sub-obtuse, acute, reticulately veined, the margins revolute, above opaque, beneath densely clothed with loose, ferruginous tomentum. h. 25ft. Neilgherries, 1840. Tree. A variety of R. arboreum. (B. M. 4381; F. d. S. 1030-1.) R. niveum (snowy-leaved). fl. rather numerous, moderately large, on short, tomentose peduncles; calyx very small; corolla externally yellowish-lilac, internally pale lilac, blotched with deeper lilac, and at the inner base having five deep blood-purple spots, broadly campanulate, narrow at base; limb five-lobed, retuse and slightly waved; stamens ten, included. May. l. moderately large, spreading, opaque on both sides, obovate-lanceolate, tapering below into a short footstalk; young leaves white-tomentose all over, afterwards glabrous above, clothed beneath with white, appressed, flocculent tomentum. Sikkim, 1850. Shrub. (B. M. 4730.) R. n. fulvum (tawny). fl. of a deeper purple colour, and with larger trusses, than in the type. l., under-surface buff-coloured. Sikkim, 1885. A handsome plant. (B. M. 6827.) R. Nuttallii (Nuttall's).* fl. white, scarcely rosy, fragrant, in corymbs of four to six; calyx lobes large, rather thick, oblongoval, obtuse; corolla sub-campanulate, 4 1/2in. to 5in. long, five-lobed; stamens ten. May. l. large, coriaceous, oval, obtuse at both ends, apiculate, below closely reticulated with dark scales. h. 12ft. to 30ft. Bhotan, 1859. Shrub or tree. In a wild state, this frequently occurs as an epiphyte on the branches of large trees. (B. M. 5146.) R. parvifolium (small-leaved). fl. pale rose, in small, compact, terminal umbels; calyx small, five-toothed; tube half as long as the five-lobed, sub-campanulate limb. Spring. l. 1/2in. to 3/4in. long, oblong, acute, attenuated at base, scaly on both sides, green above, rusty beneath. Baiacul, 1877. An erect, flexuously-branched, hardy species. (R. G. 902.) R. pendum (pendulous). fl. small; calyx large in proportion, deeply cut into five lobes; corolla pure white, about 1in. in diameter, externally lepidote; tube very short, gradually expanding into a five-lobed limb; stamens ten.