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Spring (L chiefly at the tips)

l. chiefly at the tips of the ultimate branches, on short petioles, spreading, between elliptic and oblong, acute, mucronate, 1 1/2in. to 2in. long, about 3/4in. broad, the margins recurved, beneath densely ferruginous-tomentose. Stems 3ft. to 4ft. long. Sikkim. An epiphyte on trees. (F. d. S. 662; G. C. n. s., xvii. 429; R. S. H. xiii.) R. ponticum (Pontic). fl. purple, often spotted on the upper lobe, about 2in. in diameter, disposed in short, terminal corymbs; calyx lobes sub-acute, very short; corolla campanulate-rotate, the lobes sometimes lanceolate and acute, sometimes obtuse. May. l. oblong-lanceolate, attenuated at both ends, glabrous, pale or slightly ferruginous beneath. h. 6ft. to 12ft. Asia Minor, 1763. Hardy. See Fig. 368. (B. M. 650.) Of this species, there are several varieties; the following call for mention:

R. p. azaleoides (Azalea-like). fl., corolla lobes much undulated, unspotted. l. lanceolate, sub-deciduous. Hybrid. (A. B. R. 379, under name of R. p. deciduum.) R. p. myrtifolium (Myrtle-leaved). fl. purplish, unspotted; corolla scarcely 1in. in diameter. l. smaller than in the type, being about 2in. long. (L. B. C. 908, under name of R. myrtifolium.) R. punctatum (dotted). fl. in dense corymbs; calyx lobes small, rounded, sometimes minute; corolla rose-colour, spotted within, somewhat funnel-shaped, longer than the pedicels. May and June. l. elliptic, 2in. to 3in. long, acute at each end (sometimes 1in. to 1 1/2in. long, oval or obovate and obtuse), glabrous; under surface, as well as the corymbs, thickly dotted with resinous globules. h. 4ft. to 6ft. North America, 1786. (A. B. R. 36; W. D. B. 162A, under name of R. p. minus.) R. p. majus (larger). fl., corolla unspotted, larger than in the type. l. also larger. (B. R. 37.) R. retusum (blunt-leaved). fl. somewhat drooping, six to nine in an umbel, on red, hairy peduncles about 2/3in. long; calyx minute, yellow-green, five-toothed; corolla bright scarlet without, yellowish inside the tube, 1 1/4in. to 1 1/2in. long, tubular-infundibuliform, the base ventricose, the limb moderately spreading; stamens ten, a little exserted. May. l. 2in. to 2 1/2in. long, almost sessile, oblong or elliptic-obovate, evergreen, coriaceous, spreading, glabrous, the margins recurved, the apex very obtuse, or often retuse; old ones slightly ferruginous beneath. Branches woody, brown in age. h. 1ft. to 2ft. Java, 1853. Stove. (B. M. 4859; F. d. S. 1044; I. H. 70.) R. Rollisoni (Rollison's). fl. in a round and compact head like that of R. arboreum, but the colour is much richer, being a deep blood-red, with a few dark spots at the bottom of the tube; calyx obsolete; corolla campanulate; peduncles tomentose. Spring. l. short, oblong, acute, obtuse or even cordate at base, wavy, very rugose and convex, revolute on the edges, covered beneath with close, pale brown wool. Ceylon. A small, hardy tree, with rugged, corky bark. In its native place, it attains a height of 30ft. and a girth of 4ft. (L. & P. F. G. i. 7.) R. Shepherdii (Shepherd's). fl. of a deep scarlet, disposed in large, terminal heads like those of R. barbatum; calyx small, but distinct, four-lobed; corolla broadly campanulate, equally five-lobed; stamens ten. Spring. l. towards the ends of the branchlets, oblong or elliptic-oblong, acute, 3in. to 4in. long, about lin wide, deep green above, pale below, very thick and opaque; young ones deep purplish-red beneath. h. 6ft. Bhotan, 1859. (B. M. 5125.) R. Smithii (Smith's). A synonym of R. barbatum Smithii. R. Thomsoni (Thomson's).* fl. in a corymb of six to eight, on peduncles 1in. or more long; calyx red in the upper half, green below, 3/4in. long and wide; corolla deep blood-red and glossy; tube elongated, 2in. long, often vertically compressed; limb large, much spreading, five-lobed, the upper one spotted; stamens ten, slightly exceeding the tube. June. l. 2in. to 3in. long, very broad, generally orbicular-ovate, but sometimes nearly orbicular, blunt and shortly mucronate at apex, quite glabrous, sub-glaucous below. h. 6ft. to 10ft., or sometimes 15ft. Sikkim, 1851. (B. M. 4997; F. d. S. 688-90; R. S. H. xii.) R. triflorum (three-flowered). fl., calyx very short, five-toothed or lobed; corolla greenish-yellow, resembling that of the common Azalea; limb nearly 2in. across, of five spreading segments; stamens eight, much exserted, the style much longer; peduncles usually in threes, 1/2in. to 3/4in. long. May and June. l. often pendulous, on rather short, slender petioles, ovate-lanceolate, approaching oblong or elliptical, 2in. (rarely 3in.) long, acute at both ends, or cordate at base and sometimes blunt, beset with ferruginous squamules below. Branches twiggy. h. 4ft. to 6ft. Sikkim, 1850. Half-hardy. (G. C. n. s., xviii. 45; R. S. H. xix.) R. Veitchianum (Veitch's).* fl. pure white, three or four together from the apex of a branch; corolla very large, between campanulate and funnel-shaped, the margins of the limb singularly waved and crisped. May. l. 3in. to 4in. long, obovate, acute, mucronate, very shortly petiolate, glaucous and clothed with red or ferruginous scales beneath. h. 6ft. Moulmein, 1850. Halfhardy. (B. M. 4992.) R. virgatum (twiggy). fl. very delicate rose-colour, axillary from the upper and more crowded leaves, nearly sessile, when fully expanded forming a leafy head. April. l. scattered, petiolate, short or oblong-lanceolate, acute and slightly mucronate. Branches twiggy, slender, the new shoots covered with copious, peltate scales. h. 1 1/2ft. Sikkim-Himalaya, 1850. Halfhardy. (B. M. 5060.) R. Wallichii (Wallich's). A form of R. campanulatum. R. Wightii (Wight's). fl. on slender pedicels, 1in. to 1 1/2in. long, faintly honey-scented, twelve to twenty in heads larger than those of R. arboreum; calyx obsolete; corolla pale straw-colour, stained and spotted with blood-colour on the inside of the tube and upper lobes, large and very beautiful, truly bell-shaped, five-lobed at the insertion of the pedicel; stamens ten. June. l. 6in. to 8in. (rarely 10in.) long, 2 1/2in. to 3in broad, very coriaceons, rather flat, deep green above, covered with rusty-cinnamon tomentum beneath, rarely pale and nearly white in the young foliage; petioles 1/2in. long, stout. h. 6ft. to 14ft. Sikkim, 1851. A small, shrubby tree. (R. S. H. xxvii.) R. Wilsoni (Wilson's). A hybrid between R. ciliatum and R. glaucum, It has the foliage of the former without the hairs, and is destitute of the glaucous hue of the latter. The corolla is longer than in R. glaucum, but with a prevalence of the same rose-colour, not verging to white, as in R. ciliatum. (B. M. 5116.) R. Windsori (Windsor's). fl. many in a crowded head; calyx lobes elongated, tapering; corolla deep crimson-scarlet, the lobes all emarginate; stamens ten.