RHODODENDRON 



RHODODENDRON 



2947 



3, funnel-shaped, white, faintly blushed, to 4 in. across; stamens 

 18-20. Himalayas. B.M. 4805. F.S. 9:912. R.H. 1855:301. 

 I.H. 4:140. Gt. 9:277 (as R. Jenkinsi). H.F. 7:296. Var. obtuai- 

 folium, Hutchins. Lvs. rounded at both ends: calyx-lobes longer. 

 Manipur. B.M. 8212. R. molayanum. Jack. (1). Small shrub or 

 small tree: Ivs. elliptic-lanceolate, red-brown-lepidote beneath, 34 

 in. long: fls. few, salver-shaped, dull scarlet, J 4 in. long. Winter. 

 Malacca, Java. B.M. 6045. R. Mdngltsii, Hort. Hybrid of R. 

 Griffithianum and R. hybridum album elegans. Fls. large, white, 

 spotted. G.C. II. 24:49; III. 12:767. Gn. 66, p. 393; 69, p. 329. 

 F.S.R. 3, p. 39. G. 13:101. R. Mdriesii, HemsL & Wilson (6). 

 Allied to R. rhombicum. Shrub, to 8 ft.: Ivs. oval, acute, silky- 



Cubescent on the midrib beneath, 2-3 in. long: fls. 1-3, rose-pink, 

 roadly campanulate, 1J^ in. across; stamens 10. Cent. China. 

 B.M. 8206. R. modistum, Hook. f. (1). Small shrub, glabrous: 

 Ivs. elliptic-oblong, greenish yellow and lepidote beneath, 2-3 in. 

 long: fls. 6-10, broadly funnelform, pale pink, spotted red within, 

 1 ] 2 in. across. Himalayas. B.M. 76S6. R. Moorei, Wats. Hybrid 

 between R. arboreum and R. campanulatum. Fls. large, white 

 spotted purplish: Ivs. with buff-colored tomentum beneath. R. 

 Mortlidnum, Lem. Hybrid between R. catawbiense and probably 

 R. ponticum. Fls. lilac- violet, with a whitish blotch spotted with 

 yellow. H.U. 4:1. R. moulmainense. Hook. (2). Shrub: Ivs. 

 elliptic-lanceolate, glabrous, 4-5 in. long: fls. many, white, funnel- 

 form-campanulate, 1 J-i-2 in. across. Himalayas. B.M. 4904. 

 R. moupinense, Franch. (1). Shrub, to 4 ft., sometimes epiphytic: 

 Ivs. ovate to ovate-oblong, obtuse, rusty lepidote beneath, 1-1 J^ 

 in. long: fls. solitary, white, spotted purple, 1}^ in. across. W. 

 China. B.M. 8598. G.C. III. 55: 133. R.H. 1914, p. 155. Gn. 78, 

 p. 96. R. multicolor, Miq. Small, slender shrub: Ivs. whorled, 

 narrowly elliptic-lanceolate, 2-3 in. long: fls. few, funnelfonn- 

 campanulate, 1 in. long, vellow or dark red. Winter. Sumatra. 

 B.M. 6769. Tender. The red-fld. form is distinguished as var. 

 Curtisii, Hort. Gn. 56, p. 62. F. 1884:113. G.Z. 30:73. R. 

 myrtifolium, Schott & Kotschy, not Lodd.=R. Kotschyi. R. 

 nigro-punctatum, Hort., not Franch.=R. nitidulum var. nubig- 

 enum. R. nipponicum, Matsum. (5). Shrub: Ivs. deciduous, 

 elliptic-obovate, obtuse, strigose on the veins beneath and spa- 

 ringly strigose above, 2 J-7 in. long: fls. in dense heads, white, sub- 

 campanulate, 2 3in. long; stamens 10, about as long as the corolla; 

 style glabrous; ovary villous. Japan. R. nitidulum, Rehd. <fc 

 Wilson (1). Shrub, 2-4 ft.: Ivs. oval or ovate, densely lepidote on 

 both sides, J^-J'zin. long: fls. 1-2, violet-purple, funnelform-rotate, 

 1 in. across. W. China. Var. nubigenum, Rehd. & Wilson (R. 

 nigro-punctatum, Hort., not Bur. <fc Franch.). One-half to 1 ft., 

 densely branched: Ivs. J^-J^in. long, brown beneath: fls. rosy lilac, 

 ? 4 in. across: calyx large, usually colored. W. China. B.M. 8529. 

 R. niieum, Hook. f. (2). Small shrub, allied to R. campanulatum: 

 Ivs. obovate-oblong, whitish tomentose all over at first, later gla- 

 brous above, 3-6 in. long: fls. broadly campanulate, light rose- 

 lilac at the base, within with 5 purple spots, 2 in. across. Himalayas. 

 B.M. 4730. J.F. 4:421. Var. fulrum. Hook. Lvs. light brownish 

 tomentose: fls. deep purple-lilac. B.M. 6827. R. Xoblednum, 

 Lindl. Hybrid of R. arboreum and R. caucasicum. Fls. rosy crim- 

 son. B.R. 1820. Gn. 77, p. 30. R. XuUattii, Booth (1). Shrub, 

 sometimes epiphytic or tree 30 ft. high: Ivs. elliptic-oblong, reticu- 

 late, pale and lepidote beneath, 6^-12 in. long: fls. 4-12, broad funnel- 

 form, white, tinged yellow within, fragrant, to 6 in. across; calyx 

 large. Himalayas. B.M. 5146. F.S. 13:1326, 1327. Gn. 54, p. 

 106; 79, p. 290. G.C. II. 20:49; III. 12:436 (suppl.) R.B. 31:145. 

 G.Z. 2:96. R.H. 1913:452. R. obovatum. Hook. f.=R. lepidotum 

 var. obovatum. R. prbiculdre, Decne. (R. rotundifolium, David) 

 Lvs. nearly orbicular, 2-4 in. long, usually not so broad as 

 long: fls. 8-10; corolla 2 in. across, rosy red. W. China. R. oreo- 

 doxa, Franch. (R. hsematochilum, Craib). (2). Shrub, to 10 ft.: 

 branchlets soon glabrous: Ivs. elliptic-lanceolate, glabrous, yellowish 

 green beneath, 2}^-3H in. long: fls. 10-12, rose-pink, campanulate, 

 7-8-lobed, 1 ? 4 in. across. W. China. B.M. 8518. R. otaium, 

 Planch. (Azalea ovata, Lindl. A. myrtifolia, Champ.) (3). Lvs. 

 ovate or elliptic-ovate, glabrous, 1-2 in. long: fls. rotate, pink or 

 nearly white, 1 1 2 in. across; stamens 5. Cent. China. B.M. 5064. 

 J.H.S. 1847:126. R. pach$trichum, Franch. (2). Shrub, to 18 ft.: 

 Ivs. narrow, oblong-lanceolate, acuminate, rounded at base, 

 ruf ously hairy on the midrib beneath and on the petiole, 2 J-5 in. 

 long: fls. 10-15, campanulate, 1 H in. across, pale pink to white; 

 stamens 10. W. China. R. parrifolium, Adams (1). Shrub allied 

 to R. lapponicum, but larger: 3 ft. high: Ivs. not revolute at the 

 margin, larger: fls. larger, purple or white; style much longer than 

 stamens. Siberia, Kamchatka, Japan. Gt. 26:904. G.C. III. 

 39: 164, 165. R. pendulum, Hook. f. (2). Slender shrub, 4 ft. high: 

 Ivs. elliptic to oblong, acute, ferrugjneous-tomentose beneath, 

 lV-z-2 in. long: fls. few, broadly campanulate, white, about 1 in. 

 across. Himalayas. F.S. 7:662. G.C. II. 17:429. R. pentaphyl- 

 lum, Maxim.=R. quinquefolium. R. piitosporifdlium, Hemsl.=R. 

 stamineum. R. poiylepis, Franch. (R. Harrovianum, HemsL) (1). 

 Shrub, to 10 ft.: Ivs. lanceolate, acute at both ends, glabrous above, 

 densely lepidote beneath, 1 J--3 in. long: fls. 3-5, purple or lilac- 

 purple, 114 in. across; stamens 10, exserted. W. China. B.M. 

 8309. R.H. 1914:324. R. primulinum, Hemsl.=R. flavidum. 

 R. Przetrdlskii, Maxim. (2). Allied to R. brachycarpum, but lys. 

 glabrous and pale green beneath: fls. white, spotted purple within. 

 China. Hardy. R. pulcherrimum, Lindl. Hybrid of R. arboreum 

 and R. caucasicum. Fls. pink, paler in center, spotted. B.R. 1820. 

 R. quinquefolium, Bisset & Moore (6). Deciduous shrub: Ivs. 4-5, 

 subverticillate at the end of the branchlets, short-petioled, rhom- 

 bic, acutish or obtuse, ciliate and sparingly strigose-pubescent, 

 1-1 3 4 in. _long: fls. 1-2, campanulate, 3 in. across; stamens 10. 

 Japan. Var. roseum, Rehd. Fls. pink; possibly identical with 

 R. pentaphyllum, Maxim. R. retusum, Bennett (1). Shrub, 2 ft. 

 high: lys. obovate to obovate-oblong, glabrous, lepidote beneath, 

 2-2 Yt in. long: fls. 6-9, tubular-funnel-shaped, bright scarlet, to 



1H in- long. Java. B.M. 4859. F.S. 10:1044. I.H. 2:70. Tender. 

 R. Ririei, Hemsl. & Wilson (2). Shrub, to 18 ft.: Ivs. lanceolate 

 or oblong-lanceolate, acute at both ends, glabrous and grayish 

 below, 4-6 in. long: fls. about 10, white, 2 in. across. W. China. 

 R. robustissimum, Lindl.=R. fastuosum. R. Rollissonii, Paxt. (2). 

 Small tree, 30 ft. high, allied to R. arboreum and probably variety: 

 Ivs. oblong, wrinkled above, tawny-tomentose beneath: fls. in a 

 dense head, campanulate, deep blood-red. Ceylon. B.R. 29: 25. 

 R. rotundifolium, David=R- orbiculare. R. Rorellii, Leroy. Hybrid 

 of R. arboreum and R. dahuricum. Fls. rich crimson. R.H. 1868: 

 190. R. Rdylei, Hook.=R. cinnabarinum var. RoyleL R. 

 rubiginosum, Franch. (1). Rigid shrub, 3 ft. high: Ivs. oval to 

 oblong-lanceolate, densely ferrugineous-lepidote beneath, 2-3 

 in. long: fls. few, broadly funnelform, bright rose-red, 1J^ in. 

 across. Yunnan. B.M. 7621. R. rufescens, Franch. (1). Shrub, 

 to 4 ft.: Ivs. oval, brown-tomentose beneath, J-l in. long: 

 fls. white, about jtin. across. W. China. R. Russellidnum, 

 Sweet. Hybrid of R. arboreum and R. catawbiense. Lvs. 

 tomentose beneath: fls. rosy crimson. R. salignum, Hook.=R. 

 lepidotum var. chloranthum. R. Sargentianum, Rehd. & Wilson. 

 (1). Alpine shrub, 1-2 ft.: Ivs. oval, obtuse, and mucronulate, 

 rusty-tomentose beneath, J$-Jiin- long: fls. 6-12, funnelform. 

 whitish or pale yellow, J^in. across; stamens 5; calyx large. W. 

 China. R. scabrifolium, Franch. (1). Small rigid shrub, hispid: Ivs. 

 oblong-lanceolate, ciliate, hispid above, pale and lepidote beneath, 

 2^-3}i in. long: several few-fld. clusters at the end of branches: 

 fls. broadly campanulate, blush, 1^2 in. across. Yunnan. B.M. 

 7159. R. Sedrsix, Rehd. & Wilson. (1). Shrub, to 15 ft.: Ivs. 

 oblanceolate to oblong-lanceolate, acuminate, glaucescent and 

 lepidote beneath, 1 J-2-3 in. long: fls. 4-8, funnelform-campanulate, 

 IJi in. across, white or pale purple. W. China. G.C. III. 55:334. 

 R. semibarbalum, Maxim. (Azalea semibarbata, Kuntze) (3). 

 Allied to R. albiflorum. Lvs. elliptic, crenately ciliate, setose 

 beneath: fls. greenish yellow, spotted purple, Ji-Jiin. broad. 

 Japan. Gt. 19:666. -4. serpyttifolium, Miq. (Azalea serpylli- 

 foua. Gray) (6). Low, rigid shrub: Ivs. deciduous, obovate. Ji- j-jin. 

 long: fls. single, rosy red, J-z-J^in. broad. Japan. B.M. 7503. R. 

 Sesterianum, Hort. Hybrid of R. Edgeworthii and R. formosum. 

 Fls. large, white. G. 17:383; 20:701. R.H. 1906. p. 488. ft. seto- 

 sum, D. Don (1). Shrub, about 1 ft.; branchlets setose: Ivs. ellip- 

 tic-obovate or oblong, lepidote on both sides, setosely ciliate, J$- J$ 

 in. long: fl. rosy purple, nearly rotate, deeply divided, about 1 in. 

 across. E. Himalayas. B.M. 8523. R. Sheltonx, HemsL &. Wilson 

 (2). Evergreen shrub, 4-6 ft. high: Ivs. oval or ovate, 2^-4 in. 

 long, quite glabrous; petiole H-l in. long: corolla broadly campanu- 

 late, 7-lobed, 1 Ji in. across, pink. W. China. R. Shepherdii, Nutt. 

 (2). Shrub: Ivs. oblong-lanceolate, glabrous, pale Beneath, 3-4 in. 

 long: fls. in a dense head, campanulate, deep scarlet, 2 in. across. 

 Himalayas. B.M. 5125. R. Shilsonii, Hort. Hybrid of R. barba- 

 tum and R. Thomsonii. Fls. dull red. Gn. 57, p. 261. R. sidero- 

 phyUum, Hort., not Franch.=R. Davidspnianum. R. SmUhii, 

 Sweet. Hybrid of R. arboreum and R. ponticum. Fls. rose-purple, 

 Var. dlbum, Hort. Fls. white, early. R. SmUhii, Nutt.=R. barba- 

 tum var. Smithii. R. SmUhii aureum, Hort. See under No. 28, R. 

 azaleoides. R. Souliei, Franch. (2). Shrub, to ID ft.: Ivs. broadly 

 ovate, cordate, mucronulate, glabrous, whitish beneath. 1^-2 J^ 

 in. long: fls. 57, rose-pink, broadly campanulate, with short 

 rounded lobes. W.China. B.M. 8622. G.C. III. 45:380. Gn. 73. 

 p. 278. G.M. 52:416. J.H.S. 35, p. 137, fig. 89. R. spinuliferum, 

 Franch. (1). Shrub, to 8 ft.: branchlets finely gray, pilose and 

 hispid: Ivs. lanceolate, acute at both ends, wrinkled above, lepidote 

 and slightly pilose beneath, 1-1 Ji in. long: fls. usually 4, red, 

 tubular, with upright lobes, 1 in. long; stamens exserted. S. W. 

 China. B.M. 8408. R.H. 1910:404. R. Spooneri, HemsL & 

 Wilson=R. decorum. R. stamineum, Franch. (R. pittospori- 

 folium. HemsL) (3). Shrub, to 20 ft.: Ivs. obovate-oblong to elliptic- 

 oblong, acuminate, glabrous, 2J-4 in. long: fls. many, white to 

 pink, spotted yellow, funnelform with long narrow tube, 1-1 J^ in. 

 long, fragrant. Cent, and W T . China. B.M. 8601. R. striffillogum, 

 Franch. (2). Shrub, to 15 ft.: branchlets and petioles setose; lys. 

 oblong-lanceolate, subcordate at the base, with crustaceous white 

 tomentum and setose hairs beneath, 46 in. long: fls. many, white 

 to purple, f unnelf orm-campanulate, 1 Yt in. across. W. China. 

 R. sublanceolatum, Miq. (Azalea sublanceolata, Kuntze) (6). Allied 

 to R. poukhanense. Lvs. narrow-elliptic to oblanceolate, acute at 

 both ends, with 5-9 pairs of veins, strigose on the veins on both 

 sides, 1 ' i- 2 in. long; fls. 1-3; sepals oblong obtuse, strigose and 

 glandular-ciliate; corolla funnelform, rosy red to crimson, 3 in. 

 across; stamens 10. S. Japan. B.M. 8478. G.C. III. 49:342. 

 J.H.S. 37, p. 131, fig. 115. R. taliense, Franch. (2). Shrub, to 10 

 ft.: Ivs. ovate-oblong, subcordate, short-acuminate, fulvous- 

 tomentose beneath, 2J4-5 in. long: fls. 3-12, white to pink, funnel- 

 form-campanulate, 1 in. across; ovary glabrous. W. China. R. 

 Teysmannii, Miq. (1). Closely allied to R. javanicum: Ivs. more 

 shining, not lepidote beneath: fls. somewhat smaller, pale lemon- 

 yellow. Sumatra, Java. R. Thomsonii, Hook. f. (2). Shrub, 15 

 ft. high: Ivs. obovate-oval, glabrous, glaucescent beneath, 2-3 in. 

 long: fls. 6-8, campanulate, deep blood-red, 2 in. across; calyx large. 

 Himalayas. B.M. 4997. R.H. 1855:121. F.S. 7:688-90. G. 

 28:247; 36:535. R. trichostomum, Franch. (1). Shrub, to 6 ft.: 

 rvs. ovate-oblong to elliptic-lanceolate, rusty-tomentose beneath, 

 H Jiin. long: fls. 10-15, rose-pink, tubular-funnelforni, J^in. across, 

 mouth hairy; stamens included. W. China. R. triflorum. Hook, 

 f. (1). Shrub, 6 ft. high: Ivs. ovate-lanceolate, glaucous beneath 

 and with ferrugineous scales, 2-3 in. long: fls. mostly 3, slender- 

 pedicelled, broadly campanulate, greenish yellow, 2 in. across. 

 Himalayas. F.S. 7:673. G.C. 11.18:45. J.H. III. 30:193. G. 26: 

 282. R. Tschonoskii, Maxim. (Azalea Tschonoskii. Kuntze) (6). 

 Low shrub: Ivs. elliptic, Ji-Hin. long: fls. 2-4, white, JiiO- broad. 

 Japan. R. tubifldrum. DC.=R. malayanum. R. Ungernii, 

 Trautv. (2). Closely allied to R. Smirnovii, but fls. white: calyx 



