RHODODENDRON 



RHODODENDRON 



2945 



lepidote beneath, 1 Ji in. long: fls. small, funnelform, yellowish 

 white, V 2 in. long; stamens 5, included. Himalayas. B.M. 3947. 

 Almost hardy. R. argenteum. Hook. f.=R- grande. R. argyro- 

 phyllum, Franch. (2). Shrub, to 15 ft.: Ivs. oblong-lanceolate or 

 oblanceolate, with white crustaceous tomentum beneath, 3-6 in. 

 long: fls. 7-10, slender-stalked, funnelform-eampanulate, 1 Ji in. 

 across, pale rosy-purple; stamens 14, included. W. China. Very 

 variable. R. Aitcklandii. Hook. f.=R, Griffithianum var. Auck- 

 landii. R. auriculaium, Hemsl. (2). Shrub, to 15 ft.: Ivs. oblong, 

 obtuse and mucronate, auriculate at the base, rusty-tomentose 

 beneath, 4-8 in. long: fls. 6-8, white to rosy red, funnelform, about 

 3 in. across; pedicels hairy: bud-scales lanceolate. Cent. China. 

 J.H.S. 28, p. 64. R. batsamin&florum, Hort. Hybrid of the Java- 

 nese group, with double pink fls. G.C. II. 18:230; III. 12:769. 

 Gt. 37, p. 265. G.Z. 27:241. J.H. III. 43:151. Var. album, Hort. 

 Fls. double, white. Gn.W. 5:373. G.Z. 27:241. Var. aiireum, 

 Hort. Fls. double, yellow. G.Z. 27:241. The name has also been 

 used for a double form of R. indicum, see R. indicum var. rosiflorum. 

 R. barbatum. Wall. (2). Tree, attaining 60 ft.: Ivs. with setose 

 petioles, elliptic-oblanceolate, glabrous and pale beneath, 5-7 in. 

 long: fls. deep red, campanulate, 1> in. across, in dense clusters. 

 Himalayas. F.S. 5:469-72. G.M. 53:261. Var. Smlthii, Clarke. 

 I.vs. ferrugineously subtomentose beneath. B.M. 5120. R. 

 blandfordiseflorum, Hook. (1). Slender shrub, 8 ft. high, allied to 

 R. cinnabar inura: Ivs. oblong-lanceolate, ferrugineous-lepidote 

 beneath, 2-3 in. long: fls. funnelform, with cylindric tube, brick- or 

 orange-red, yellow within, 2J in. long. Himalayas. B.M. 4930. 

 F.S. 11:1173. I.H. 3:112. B.H. 7, p. 47. G.C. 1856:548; 1871:236. 

 Gn. 15:182 (as R, cinnabarinum). R. Bodthii, Nutt. (1). Shrub, 

 6 ft. high, often epiphytal: Ivs. ovate-oblong, or oblong-lanceolate, 

 hirsute above when young, minutely lepidote beneath, 4-5 in. long: 

 fls. in dense clusters, campanulate, yellow, 1 }4 in. across. Himal- 

 ayas. B.M. 7149. I.H. 5:174. R. bracteatum, Rehd. & Wilson (1). 

 Allied to R. yanthinum. Shrub, to 6 ft.: Ivs. oblong, obtuse, 

 lepidote beneath, 1-2 in. long, toward the base of the branchlets 

 reduced to persistent bracts: fls. 3-^6, white, spotted red, broadly 

 campanulate, 1 , 1 ^ in. across. W. China. R. Brettii, Hemsl. <fc Wil- 

 son=R. longesquamatum. R. Brookeanum, Low (1). Shrub, often 

 epiphytal, with glabrous purple branches: Ivs. oblong-lanceolate, 

 pale beneath, 69 in. long: fls. funnelform-campanulate, orange- or 

 golden-yellow, 2 ' 2 in. across. Borneo. B.M. 4935. F.S. 5, p. 477: 

 12:1238,1239. G.C. III. 9:621. Var. flacum, Hort. Fls. paler yellow. 

 G.Z. 23. p. 145. R. Broughtonii, Hort. One of the hybrid ever- 

 green rhododendrons of unknown parentage with bright rosy red 

 fls. R. Broughtonii aureum, Hort. See under No. 28, R, azaleoides. 

 R. buttatum. Franch. (2). Shrub, to 5 ft.: branchlets woolly: Ivs. 

 elliptic-oblong or oblong-ovate, dull green and wrinkled above, 

 with brownish tomentum beneath, 2-3 in. long: fls. 3-6, white with 

 yellow blotch, broadlv campanulate, 2 in. across, fragrant; calyx 

 large. G.C. III. 46:37$. S.W. China. R. burmdnicum, Hutchins. 

 (1). Lvs. oblanceolate, densely scaly on both sides, 2H~3Hin. long: 

 fls. greenish white, very sweet-scented. Burma. R. calophyllum, 

 Nutt. (1). Shrub, 3 ft. high: Ivs. oblong-ovate or elliptic, glossy 

 above, lepidote beneath, 3-5 in. long: fls. 4-5, tubular-campanula te, 

 white, slightly tinged yellowish green, 3 in. across. Himalayas. 

 B.M. 5002. F.S. 22:2340. R. calophytum, Franch. (2). Shrub or 

 small tree, to 45 ft.: Ivs. oblong-obovate, glabrous, 812 in. long: 

 fls. 15-20. long-stalked, purple, rose-colored or white, broadly cam- 

 panulate, 2 in. across; stamens about 20; ovary glabrous. W. China. 

 R. cameUiaeflorum, Hook. f. (1). Shrub, 6 ft. high, often epiphytal: 

 Ivs. elliptic-lanceolate, ferrugineous-lepidote beneath, 2-3 in. long: 

 fls. 1-2, short-pedicelled, broadly campanulate, white or slightly 

 tinged rose, IJj in. across; stamens 16. Himalayas. B.M. 4932. 

 R. campylocarpum, Hook. f. (2). Shrub, 6 ft. high: Ivs. elliptic, 

 obtuse, mucronulate, glabrous and glaucous beneath, 2-3 Ji in. 

 long: fls. several, campanulate, vellow, fragrant, to 2}- in. across. 

 Himalayas. B.M. 4968. Gn. 54:182; 78, p. 573. G.C. II. 21:833; 

 III. 11:501 and 12:699. G. 25: 195; 28:379; 36:379; 37: 19. G.M. 

 57:8.31. R. cdndidum, Rehd. (Azalea Candida, Small) (4). Allied 

 to R. viscosum. Shrub, to 6 ft.: Ivs. oblong or obovate-oblong, 

 thinly tomentose above, densely white-tomentose and reticulate 

 beneath, l /-r-2 in. long: fls. white or pinkish, 1 in. across, after the 

 Ivs. Ga. R. cdrneum, Hutchins. (1). Allied to R. Veitchianum. 

 Shrub, to 3 ft.: Ivs. elliptic-obovate, glabrous, glaucous and scaly 

 beneath, 2 14 4J,4 in. long: fls. campanulate-funnelform, flesh-col- 

 ored, 3H in- across; stamens usually 12. Burma. B.M. 8634. 

 R. Cartonidnum, DC. (R. Cartoni, Hort.). Allied to R. azaleoides 

 and said to be of the same parentage as R. Gowenianum, but Ivs. 

 glabrous and fls. more violet, whitish toward the base. B.R. 1449. 

 R. Carronii, Andre. Hybrid of R. formosumand R. Veitchii. Lvs. 

 elliptic: fls. white, usually slightly tinged rose, fragrant, 3Ji in. 

 across. R.H. 1885:60. R. Chdmpiony, Hook. f. (Azalea Cham- 

 pionse, Kuntze) (6). Shrub, to 6 ft.: Ivs. oblong-lanceolate, acumi- 

 nate, dark green and glabrous above, rusty colored and pilose 

 beneath, ciliate, 2 J.^-6 in. long: fls. 4-6, wide campanulate-funnel- 

 form, with oblong lobes, 3 in. across, rose-colored; stamens 10. 

 Hong-Kong. B.M. 4609. J.F. 2:208. R. chartophyUum, Franch. 

 (1). Allied to R. racemosum. Shrub, to 3 ft.: Ivs. elliptic, acumi- 

 nate, lepidote beneath, 2^-3^ in. long: fls. 6-12, light pink, 

 spotted, funnelform-campanulate, 2 in. across. S.W. China. 

 G.C. 111.51:291. Gn. 78, p. 304. R.H. 1912, p. 135. R. chrys- 

 dnthum, Pall. Low shrub, 2 ft. high: Ivs. elliptic-oblong, acute, 

 1-2 in. long, ferrugineous beneath: fls. few, slender-pedicelled, 

 broadly campanulate, yellow, 1 Yi in. across. Siberia, Kamchatka. 

 Hardy. R. ciliatum, Hook. f. (1). Small shrub, 2-4 ft.: Ivs. ellip- 

 tic, acuminate, pilose above, ciliate, pale and lepidote beneath, 

 2 in. long: fls. several, campanulate, pale purple, 1 J^ in. across. 

 Himalayas. G.C. III. 29:247. Gn. 59, p. 351; 67, p. 266; 75:202. 

 G. 36:658. Var. rdseo-dlbum. Hook. Fls. larger, white, tinged 

 rose. B.M. 4648. F.S. 8:766. Gt. 16:563. J.F. 3:312. R. 

 ciliicalyx, Franch. (1). Small shrub: Ivs. elliptic-obovate, shortly 



acuminate, ciliate, pale and lepidote beneath: fls. 7-10, cam- 

 panulate, white, 2 in. across. Yunnan. R.H. 1899:36. B.M. 7782. 

 G.W. 8, p. 245. R. cinnabarinum. Hook. f. (1). Slender-branched 

 shrub: Ivs. elliptic to elliptic-lanceolate, lepidote beneath, 2-3 in. 

 long: fls. many, nodding, tubular-campanulate, rose-orange or 

 brick-red, 1)4 in. long. Himalayas. G. 34:111. Var. pdllidum, 

 Hook. Lvs. glaucous beneath: fls. pale rose, spotted red within. 

 B.M. 4788. Var. Roylei, Hook. Lvs. ferrugineous beneath: fls. 

 larger, of brighter color. Gn. 44:558. G.C. II. 21:765; III. 

 12:709. R. citrinum, Hassk. Small shrub: Ivs. elliptic-oblong, 

 obtuse, lepidote and pale beneath, 1J4-2 in. long: fls. several, 

 nodding, campanulate, pale yellow, %in. long, fragrant. Java. 

 B.M. 4797. Tender. R. dirianum. Hook. Hybrid of R. arboreum 

 album and R. catawbiense. Fls. white, blushed and spotted car- 

 mine. B.M. 4478. R. CoUeUianum, Aitch. <fc Hemsl. Shrub, 10 

 ft. high: Ivs. elliptic-lanceolate, brownish lepidote beneath, 1 }^-3 

 in. long: fls. short-pedicelled. funnelform, white, 1 in. long. 

 Afghanistan. B.M. 7019. G.C. III. 4:297. J.H. III. 51:502. 

 R. concinnum, Hemsl. (R. coombense, Hemsl.) (1). Shrub, to 10 

 ft.: Ivs. oval, lepidote beneath, 1-2 in. long: fls. 3-5, purple, cam- 

 panulate, 1 Yi in. across. W. China. B.M. 8280, 8620. G.C. III. 

 53:341. R. coombense, Hemsl. ==R, concinnum. R. crdssum, 

 Franch. Closely allied to R. Maddenii, differing in its larger calyx- 

 lobes. S. W. China. R. Cunninghamii, Moore. Hybrid of R. 

 arboreum var. cinnamomeum and R. TTmTJTniim var. album. Fls. 

 white, spotted purple. Moore, Card. Mag. Bot. 1851:121. Npt 

 to be confounded with R. Cunningham's White, a variety or hybrid 

 of R. caucasicum, which is a dwarf and hardy shrub, much used in 

 Germany as a stock for grafting hardy varieties. R. Ctirtm'i, 

 Moore=R. multicolor yar. Curtisii. R. Ddlhousix, Hook. f. (1). 

 Straggling shrub, attaining 8 ft., often epiphytal: Ivs. elliptic, rusty- 

 lepidote beneath, 4-5 in. long: fls. 3-5, campanulate, yellow, chang- 

 ing to white, fragrant, 4J3 in. across. Himalayas. B.M. 4718. 

 F.S. 5:466-8. Gn. 28:318; 48, p. 108. G.C. III. 33:338. F.S.R. 

 3:40. G. 33:579. Remarkable for the large, lily-like fragrant fls. 

 A double-fld. variety is figured in Gn. 13, p. 517. R. Dalhousise 

 hybridum (B.M. 5322) is a hybrid with R. formosum, and R. Dal- 

 housise Yictorianum is a hybrid with R. Nuttallii, see R. Vic- 

 torianum. R. Ddtidii, Franch. (2). Shrub, to 12 ft.: Ivs. oblong- 

 lanceolate, pale green or brownish beneath, glabrous, 46 in. long: 

 fls. many, racemose, short-stalked, lilac, spotted purple, broadly 

 campanulate, 7-lobed, lJ^-2 in. across. W. China. R. Darid- 

 sonidnum, Rehd. & Wilson (1). Shrub, to 10 ft.: Ivs. thinly coria- 

 ceous, elliptic to oblong-lanceolate, sparingly lepidote above, 

 densely so beneath and glaucescent, 1-2 Ji in. long: fls. 1-3, axillary, 

 rosy pink, campanula te-funnelform, 1 in. across. W. China. R.H. 

 1914, pp. 323, 324. B.M. 8605. Gn. 78, p. 316 (as R. sidero- 

 phyllum). R. Ddriesii, Hort. Hybrid of R. javanicum and R, 

 retusum, with tubular orange-red fls. P.M. 20:474. G.Z. 26: 145. 

 Not to be conf9unded with Azalea Daviesii, Hort., which is a 

 Ghent azalea with white fls.; see p. 2935. R. decorum, Franch. 

 (R. lucidum, Franch. R. Spooneri, Hemsl. <fe Wilson. R. enibescens, 

 Hutchins.) (2). Shrub: Ivs. oblong, glabrous, glaucous beneath, 

 48 in. long: fls. broadlv campanulate, white or pink, to 2 

 in. across; stamens 16. W. China. G.C. 111.47:120. G. 36: 

 569. R.H. 1914, p. 305. B.M. 8643. R. Delatayi, Franch. 

 (2). Tree: Ivs. oblong-lanceolate, rufous-tomentulose beneath: 

 fls. in large, dense heads, deep red, broadly campanulate, 1 in. 

 across. Yunnan. B.M. 8137. R. dilatatum, Miq. (Azalea dila- 

 tata, Kuntze) (6). Allied to R. rhombicum. Lvs. rhombic-obovate, 

 soon glabrous, 1-2 Ji in. long: fls. 1-2, lilac-purple, rotate-campanu- 

 late, lJi-2 in. broad. Japan. S.I.F. 2:61. G.W. 14, p. 270. R. 

 discolor, Franch. (2). Shrub, to 15 ft.: Ivs. oblong or oblong-lanceo- 

 late, acute at both ends or auriculate at the base, whitish beneath, 

 6-8 in. long: fls. many, white to rosy pink, funnelform-campanu- 

 late, 6-lobed, 3 in. across. Cent. China. R. Edgarianum, Rend. & 

 Wilson (1). Shrub, to 3 ft., intricately branched: Ivs. broadly ovate 

 or oval, obtuse, densely lepidote on both sides, rusty beneath, 

 3-5-J^in. long: fls. solitary, funnelform, purple, Jiin. across. W. 

 China. R. Edgetcorthii, Hook. f. Straggling shrub, often epiphytic: 

 Ivs. ovate-lanceolate, blackish green and reticulate above, ferru- 

 gineous-tomentose below, 34 in. long: fls. few, broadly campanu- 

 late, white, tinged rose, with broad, waved lobes, 4^6 in. across. 

 Himalayas. B.M. 4936. F.S. 8:797, 798. Gt. 5:228. H.F. 4:264. 

 R.H. 1913, p. 393. R. Eeckhautei, Hort. (Azalea Eeckhautei, 

 Hort.). Hybrid between R. indicum and R. linearifolium. Lvs. 

 linear-lanceolate: corolla light pink, semi-double, deeply divided 

 into linear-oblong lobes. Very distinct; as hardy as R. linearifo- 

 lium. R.B. 37:117. R. erubescens, Hutchins.=R. decorum. R. 

 eximium, Nutt.=R- Falconeri var. eximiurn. R. exoniense, Veitch. 

 Hybrid between R. ciliatum and R. Veitchianum. Fls. white, 

 faintly tinged rose outside, 3 in. across, very fragrant. G. 6:537; 

 16:663. R. Faberi, Hemsl. (2). Shrub, to 18 ft.: Ivs. elliptic- 

 oblong, acute, rusty tomentose beneath like the branchlets, 3-6 

 in. long: fls. white to pale pink, spotted red, broadly campanu- 

 late, 1 1 /2 in- across; calyx Jiin. long. W. China. R. Falconeri, 

 Hook. f. (2). Shrub or tree, attaining 30 ft.: Ivs. elliptic or obovate, 

 rusty-tomentose beneath, 8-10 in. long: fls. many, campanulate, 

 8-10-lobed, white, with a dark purple blotch within, 1-2 in. across. 

 Himalayas. B.M. 4924. F.S. 5:477-80; 11:1166, 1167. Gt. 19:658. 

 Gn. 48, p. 103; 49, p. 441; 64, p. 377. G.C. III. 20:749. F.S.R. 

 3, p. 33. G.M. 51:203. G. 19:236; 25:22; 35:65. G.W. 14, p. 270. 

 Remarkable for its very large Ivs., sometimes to \Yt ft. long. 

 Var. eximium, Hook. Fls. rose-colored and not spotted. R. 

 Fdrgesii, Franch. (2). Shrub, to 15 ft.: Ivs. elliptic, obtuse, 

 subcordate at the base, glabrous, 2-3 in. long: fls. many, white to 

 rosy pink, spotted, broadly campanulate, 6-7-lobed, lJi-2 in. 

 across; stamens 12-14. Cent. China. G.C. Ill, 52:4. J.H. F. IV. 

 1:217. R. Fdrrerx, Tate (Azalea Farrerse, Koch. A. squamata, 

 Lindl. ) (5). Low shrub: Ivs. rhombic-ovate, subcoriaceous, 1-2 

 in. long: fls. pale pink or pale lilac, spotted, l^i in. across. 



