ERICACEAE. XLIII. RHODODENDRON. 



845 



20 R. FORMOSUM (Wall. pi. rar. asiat. 3. p. 3. t. 207,) leaves 

 lanceolate, acute, attenuated at the base, beset with rusty dots 

 beneath ; segments of corolla entire, flat ; filaments bearded ; 

 ovarium 10-celled. fj . F. Native of Nipaul. Leaves an inch 

 and a half long. Flowers about the size of those of R. Ponlicum, 

 white, suffused with red. Limb of calyx short. 



Shony Rhododendron. Shrub. 



SECT. III. POGONA'NTHUM (from jroiywv, pogon, a beard ; and 

 avdoc, anthos, a flower; throat of corolla woolly inside). Limb 

 of calyx short, 5-lobed. Corolla salver-shaped, with a cylindrical 

 tube, and a spreading limb. Stamens 8, inclosed. Ovarium 

 5-celled. Leaves evergreen, coriaceous. 



21 R. ANTHOp6ooN (D. Don, in mem. wern. soc. 3. p. 409.) 

 branchlets downy ; leaves oval, rusty beneath from lepidoted 

 tomentum ; corollas with a woolly throat. I? . F. Native of 

 Nipaul, on Gosaingsthan. R. aromaticum, Wall. cat. Shrub 

 much branched. Leaves ending in a reflexed mucrone, 

 naked above. Flowers glomerate, sulphur-coloured. Pedicels 

 short, lepidoted and resinous. Calycine segments rounded at 

 the apex, with villous margins. Segments of corolla roundish, 

 with undulately curled margins. Filaments glabrous. Stigma 

 clavate. 



Bearded-flowered Rhododendron. Fl. April, May. Clt. 1820. 

 Shrub 1 to 1| foot. 



SECT. IV. LEPIPHERUM (from \firif, lepis, a scale ; and <f>pu>, 

 phero, to bear ; leaves covered with small scales.) Limb of calyx 

 dilated, 5-lobed. Corolla campanulate or rotate. Stamens 10. 

 Ovarium 5-celled. Leaves membranous, sometimes deciduous. 



22 R. LEPIDOTUM (Wall. cat. 758.) every part of the plant is 

 beset with ferruginous scale-like dots ; leaves spatulate or lan- 

 ceolate, attenuated at the base, beset with round scale-like dots, 

 as well as the branchlets, ferruginous beneath ; calycine segments 

 rounded ; corollas short, campanulate, lepidoted, with roundish 

 entire lobes ; capsules also lepidoted ; filaments woolly at the 

 base. Tj . F. Native of Nipaul. A widely-branched shrub, 

 with the habit of R. Dauricum. Leaves of a thinner texture, 

 about an inch long. Flowers as well as the capsule covered 

 with round rust-coloured scales. Flowers deep pink, solitary 

 or 2-5 together, terminal, on short filiform pedicels. 



Scaly-doited Rhododendron. Shrub 2 to 3 feet. 



23 R. LAPPONICUM (Wahl. fl. suec. p. 249.) shrub branched, 

 procumbent ; branches divaricate ; corollas rotately funnel- 

 shaped ; leaves oblong, obtuse, stiff, beset with foveolate dots, 

 yellowish and lepidoted beneath, fy . H. Native of the Arctic 

 regions of Europe, Asia, and North America. Azalea Lappo- 

 nica, Lin. fl. suec. p. 64. spec. 214. fl. lapp. ed. Smith, p. 59. 

 t. 6. f. 1. Hook. bot. mag. 3106. Young branches obscurely 

 pubescent, warted. Leaves deep green above, pale green and at 

 length yellowish beneath, thickly beset with hollow dots on both 

 surfaces, which are covered by umbilicate permanent scales. 

 Flowers crimson, disposed in umbellate corymbs, 5-6 together, 

 surrounded by large dotted scales or bracteas. Calyx covered 

 with yellow scales, ciliated. Segments of corolla unequal, un- 

 dulated. Stamens 5-8, equal in length to the corolla. Stigma 

 capitate, 5-lobed. Filaments hairy at the base. 



Lapland Rhododendron. Fl. July. Clt. 1825. Shrub pro- 

 cumbent. 



24 R. DAU'RICUM (Lin. spec. 562.) deciduous ; leaves oblong, 

 attenuated at both ends, glabrous, lepidoted from rusty scales, 

 particularly beneath ; limb of calyx 5-toothed ; corollas rotate. 

 (7 . H. Native of Siberia, peculiar to the alpine tracts of East- 

 ern Asia ; it appears first at the mouth of the river Yenesee, and 

 beyond that, especially from the river Uda, in the pine woods, it 

 begins to be common ; but about the Baikal it is most abundant, 



and extends through the deserts of the Mongols to China and 

 Thibet ; at the Lena it becomes more rare, and beyond that it is 

 much dwarfer, with more slender flowers and narrower leaves. 

 Pall. fl. ross. 1. p. 47. t. 32. Andr. bot. rep. t. 4. Curt. bot. 

 mag. t. 636. Lodd. bot. cab. 605. Amm. ruth. 181. t. 21. 

 Roots knobbed, bound by fibres. Stems twisted and knobbed 

 in the wild state. Petioles downy. Leaves dotted on both sur- 

 faces, but ferruginous beneath ; before the fall in autumn they 

 become of a dusky red colour. The flowers rise before the leaves 

 from the tops of the branches, from buds which are composed 

 of concave downy scales. Corollas purple. 



Var. ft, atrovirens (Ker. bot. reg. t. 194.) evergreen ; leaves 

 deep green and shining above. Tj . H. Native of Siberia. 

 Sims, bot. mag. 1888. 



Daurian Rhododendron. Fl. March, Dec. Clt. 1780. Shrub 

 2 to 6 feet. 



SECT. V. CHAMJECISTUS (from -^afiat, chamai, on the ground ; 

 and cistus, the rock-rose : plants with the habit of species of 

 Helianthemum. Limb of calyx foliaceous, 5-cleft. Corolla 

 rotate. Stamens 10. Ovarium 5-celled. Leaves small, mem- 

 branous, evergreen. 



25 R. CAMTSCHA'TICUM (Pall. fl. ross. 1. p. 48. t. 33.) leaves 

 obovate, acutish, 5-nerved, naked, ciliated ; peduncles hairy, 

 usually twin ; calycine segments ciliated, foliaceous. fj . H. 

 Native of Kamtschatka and the Aleutian Islands, in muddy 

 places on the mountains. Gmel. sib. 4. p. 126. no. 13. Corollas 

 purple, rotate. A prostrate shrub. 



Kamtschatka Rhododendron. Fl. July. Clt. 1802. Shrub 

 prostrate. 



26 R. CHAM.ECISTUS (Lin. spec. 562.) leaves oblong-lanceo- 

 late, attenuated at both ends, stiffish, glandularly ciliated ; pe- 

 duncles usually twin, and are as well as the calyxes beset with 

 glandular hairs. Ij . H. Native of the Alps of Europe; as 

 of Austria, Carniola, Mount Baldo, and near Salzburgh ; and 

 in Eastern Siberia. Jacq. fl. austr. 3. t. 217. Curt. bot. mag. 

 t. 488. Lodd. bot. cab. 1491 Mich. gen. 225. t. 106. Pluk. 

 phyt. t. 23. f. 4. Corollas rotate, pale purple. A dwarf tufted 

 shrub, with small leaves, about the size of those of a species of 

 Helianthemum. 



Ground-Cistus Rhododendron. Fl. May, June. Clt. 1786. 

 Shrub -| foot. 



SECT. VI. TSUTSU'TSI (the Chinese name of the first species). 

 Limb of calyx foliaceous, 5-cleft. Corolla campanulate. Stamens 

 5-10. Ovarium 5-celled. Leaves membranous, evergreen, 

 hispid from pili. 



27 R. I'NDICUM (Sweet, fl. gard. n. s. 128.) branches strigose; 

 leaves cuneate-lanceolate, finely crenulated, strigose, attenuated 

 at both ends ; calycine teeth long-lanceolate, obtuse, ciliated, 

 spreading ; flowers terminal, solitary or twin, decandrous. 



(7 . S. Native of China. Much cultivated in Japan for the 

 sake of its elegant flowers. Azalea I'ndica, Lin. spec. 214. 

 Thunb. jap. 8t. Sims, bot. mag. 1480. Lodd. bot. cab. 275. 

 Herm. lugdb. 152. t. 153. Tsut-sut-si, Kcempf. amoen. 845. 

 t. 146. Flowers showy, scarlet or red. 



Var. ft, pulchrum (Sweet, fl. gard. n. s. 117.) calyx very 

 hairy, with subulate segments ; leaves elliptic, acute ; flowers 

 decandrous, terminal, 2-3 together. ^ . G. A hybrid between 

 R. ledifolium, impregnated by the pollen of R. I'ndicum. R. 

 I'ndicum, var. y, SmJthii, Sweet, hort. brit. 2. p. 343. Co- 

 rollas large, of a deep rosy purple, spotted with deep red 

 inside. 



Var. y, ignescens (Sweet, fl. gard. n. s. 128.). The four 

 lower segments of the corolla flame-coloured, and the superior 

 one lilac, and obsoletely dotted. )j . S. Native of China. 



