An Encyclopedia of Horticulture. 



293 



Rhododendron — continued. 



with a woolly throat and a spre;utiii,ii liiiibnf ruumlish, lunlulately- 

 curied segments; stamens eiiilit, inrlnseil. April and May. 

 I. oval, rusty beneath from lt'i>idoted tumoiitum, biennial, 

 coriaceous, terminating in a retiexed mucrone. Hranchlets 

 downy, h. 1ft. to lift. Central and Northern Asia, 1820. 

 Hardy. (B. U. 3947.) 



Fig. 366. 



Flowering Branchlet of 

 auboreum. 



Rhododendron 



R. arboreum(treedike).* Jl. white, rose, or blood-colour, dispose<l 

 in dense heads; calyx absent; cumlla caniiianulate; stamens 

 ten. March to May. I. large, mriuoenus. lanceolate, acute, 

 cordate at base or attenuated into a thick pt-titde, of a beautiful 

 green abuve, lifluw imjni'^scd witli netted veins, glal>rous, silvery 

 or feiruuiiuins-imbo^ct'iit. /'. 20ft. to 25ft. Himalayas. 1820. A 

 ma^iiiticciit, lialf-hardy trre, sometimes attaining a circumference 

 of 150ft. See Fig. 566." (P. M. B. i. 101 ; R. S. H. vi., under name 

 of H. Campbcllea-.) This species has been largely used for hybridis- 

 ing purposes; many of its progeny, however, are eai'Iy-flowering, 

 and liable to be injured by spring fro-sts. .Some of them are 

 mentif>ned herewith : li. altadereiine {B. M. 3423), R. Russell- 

 ianmn (S. B. F. G. ser. ii. 91), R. Smitkii (S. B. F. G. ser. ii. 50), 

 R. viiihilatxini (S. B. F. (!. ser. ii. 341), R. venttstum (S. B. F. G. 

 ser. ii. 288). The following are varieties : 



R. a. album (white), jf. white, with some pnrple dots above on 

 the inside. /. ferruginous beneath. (B. M. 3290; B. R. 1684.) 



R. a. cinnamomeum (cinnamon-leaved), fl. white, with purple 

 and yellow spots. I. cinnamon-coloured beneath. (B. R. 1982.) 



R. a. C, roseum (rosy). A splendid sulivariety, having rose- 

 coloured flowers 2iin. in diameter. (B. M. 3825.) 



R. a. llmbatum (bordered). Ji., corolla limb rose-colour, gra- 

 dually fading into an almost pure white throat, marked at the 

 base " ith a cleep blood-red blotch, broad. Half-hardy. (B. M. 

 5311.) 



R. a. puniceum (purple). Jl. either purplish or of an intense 

 red-scarlet colour ; corolla segments subdjiIol)ed at apex, crenate, 

 sub-undulated. /. covered below with velvety-.-ilvery, adpressed 

 pubescence. (B. R. 890 and H. E. F. 168, under name of R. ar- 

 hitri'iiin.) 



R. a. roseum (rosy), ji. rose-colour. I. ferruginous beneath. 

 (B. U. 1240; S. B. F. G. ser. ii. 339.) 



R. argenteum (silvery). A synonym of R. grande. 



R. Aucklandii (Lord Auckland's).* Jl. the largest of the genus ; 

 calyx platter-shaped, Uin. in diameter ; corolla firm, rather fleshy, 

 pure white, tinged with pink, veiny ; tube short, yellowish ami 

 rose-coloured towards the base; limb spreading, 3in. to 5in. in 

 lUaiueter ; pt--iluncles longerthan the petioles, red or green. May. 

 I. variable Iti size and breadth, 4in. to lOin. long, coriaceous, 

 obloni;-elliptical, scarcely approaching to lanceolate, acute, 

 cordate at base, full green above, paler below ; petioles 2in. 

 long. Branches sub-erect, copiously leafy. A. 4ft. to 8ft. 

 Sikkini, 1850. (R. S. H. xi.) SYiN. R. Gri(lifhianuin Aucklandii 

 (B. M. 5065). 



R. barbatum (bearded). Jl. deep puce or blood-colour, moderate- 

 sized, collected into a compact, globose head, 4in. to Sin. in 

 diameter ; calyx large, scarcely silky, deeply cut into five leaf-like 

 lobes iin. long. L, when youn^, sparingly hairy and ciliated ; 

 adults 5in. to Vin. long, liin. to 2in. or more wide, elliptic-lanceo- 

 late, acute, rather broader above the middle ; margins reflexed 



Rhododendron— conH7iwed. 



and rough with hard cilije ; petioles ^,in. long, slightly tubercled, 

 and beset with long, rigid, )>huk set;e or hairs, which often 

 extend a little way up the midrib beneath. Main trunks few, 

 clothed with reddish bark ; branches numerous, fi. 40ft. to 60ft. 

 Sikkim, 1829. Half-hardy tree. (F. d. 8. 469; R. S. H. 3.) 



R. b. Smlthii (Smith's). A variety <Uffering from the type in 

 having the under surface of the leaves furfuraceous aub-tomentose. 

 SVN. R. Smitkii (B. M. 5120). 



R. blandfordiseflorum (Blandfordia-flowered).* Jl. 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 Iin. to 2iin. long ; stamens ten ; heads five to ten- 

 flowered. I. 2in. to 3in. long, coriaceous in luxuriant plants, 

 lanceolate, acuminate, shortly petiolate, ferruginously lepidoted 

 beneath. Branchlets slender, twiggy, lepidoted. k. 8ft. Hima- 

 layas, 1851. (B. M. 4930.) 



R. Boothil (Booth's), ft. yellow, campaiudate, disposed in many- 

 flowered corymbs; calyx leaf-like, membranous, the segments 

 oval, obtuse, glal>rous. I. thickly coriareous, rhomboid, ovate, 

 acuminate, 4in. to 5in. long, 2in. to 2Un. broad, scaly beneath, 

 densely ciliated on the margins, li. 5ft. to 6ft. Bhotan. This is 

 found glowing as an epiphyte on Oak-trees in its native place. 

 (1. H. 1858, 174.) 



R. Brookeanum (sir James Brooke'sj. _fi. many, in a large, 

 loose, terndnal innbel, on rather short peduncles; calyx absent; 

 corolla full orange or golden-tawny, between l>ell and funnel- 

 shaped, large, thick, with an elongated tube and a limb of five 

 crisjied lobes ; stamens ten, as long as the tube. April. I. 6in. 

 to 9in. long, firm, obloiii;-lanceitlate, acute, full green above, the 

 same or a little paler beneath, and there sparingly dotted with 

 minute scales ; petioles dark purple, very short, br«.»ad, and thick. 

 Branches dark purple, stout. Borneo, 1848. Stove epiphytal or 

 terrestrial shrub. (B. M. 4935 ; F. d. S. v. 480 ; ti. C. 1871, 236.) 



R. B. ^acilis (slender).* Jt. pale yellow, freely produced on 

 young plants in trusses of ten to twelve. I. light green, elliptic- 

 lanceolate. 1871. (J. H. S. iii. 85.) 



R. californicum ( Calif ornian). Jt. many, in terminal umbels ; 

 calyx small, slightly pilose ; corolla rose-purple, broadly campanu- 

 late, the lobes yellow-spotted within, and undulated ; stamens 

 ten, shorter than the corolla. June. I. somewhat obovate-elliptic, 

 coriaceous, acute, glabrous, shortly petiolate, one-coloured, paler 

 beneatli. A. 3ft. to 8ft. California. Hardy. (B. M. 4863.) 



R. calophyllum (beautiful-leaved).* Jt. in corymbs of four or five, 

 on sliort, scaly peduncles ; calyx very scaly, short, live-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. I. 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 in- 

 numerable scales. Branches spreading, stout, terete, h. 3ft. 

 Bhutan, (li. M. 5002.) 



R. camelliseflorum (Camellia-flowered). Jl. solitary or twin, on 

 short, curved peduncles; calyx segments thick. ol)tuse ; corolla 

 pure white, with a faint rosy tinge, rather thick, lepidoted, l^in. 

 across. April. I. at the tips of the branches, dittering in little 

 but size from those of R. Maddt-ni, 2^hi. to Sin. 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-tiowered).* jl. pale lilac, with a few 

 purple spots, or rose-colour, corymbose ; calyx lobes very short ; 

 coroUa campanulate. about 2in. in diameter, with flat, entire 

 lobes, rounded at the apex ; pedicels glabrous. April. I. 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 ; F. M. B. 

 xvi. 193 ; S. B. F. (i. ser. ii. 241.) SvN. R. terui/inommi (R. S. H. 

 xxii.). 



R. c. seruginosum (verdigris-coloured). A form having the 

 under surface of the leaves clothed with verdigris - coloured 

 tomeutum. 



R. c, Batemanl (Bateman's). A larger-flowered, more robust- 

 habited form. (B. M. 5387.) 



R. c. Wallichii (Wallich's). Jl , corolla more brightly coloured 

 than in the type. I. elliptic or oblong, loosely tomentose 

 beneath, often caducous ; petioles densely woolly. (R. S. U. v.) 



R. campylocarpum (curved-fruited). "^ jt. honey-scented, hori- 

 zontal and nodilin;;, six to eight in a terminal head, on slender 

 pedicels ; calyx tive-lolted, i;l;iiidulose ; corolla tinged of a sulphur 

 hue, ami always si)utless, truly campanulate, nearly 2in. long, 

 broader across the live spreading lobes, which are finely veined. 

 June. Capsules curling upwards. I. coriaceous, but not thick, 

 2in. to 3iin. long, l|in. to 2in. broad, cordate at base, rounded 

 and mucronate at the apex, on slender petioles :|in. long. Ulti- 

 mate branchlets, as well as llie peduncles and peiUcels, glandular- 

 pilose, h. 6ft. Sikkim, 1851. A twiggy, branched bush. (B. M. 

 4968; K. S. H. xxx.) 



R. catawblense (Catawban). fi. lilac-purple ; calyx lobes small; 

 corolla broadly campanulate ; pedicels (and capsule) rusty-pubes- 

 cent. July. I. oval or oblong, rounded at both ends, smooth, 



