RHODODENDRON 



RHODODENDRON 



2943 



3391. Rhododendron Vaseyi. (X?i) 



Section 5. RHODORA. 



A. Stamens 10; corolla rosy purple, not 



spotted 39. canadense 



AA. Stamens 7 or 5; corolla pale rose-col- 

 ored, spotted 40. Vaseyi 



39. canadense, Zabel (R. Rhodora, Don. Rhodora 

 canadensis, Linn Azalea canadensis, Kuntze). Shrub, 

 1-3 ft.: Ivs. oval 



to oblong, ob- 

 tuse and mucro- 

 nulate, glaucous 

 and slightly 

 pubescent be- 

 neath, 1-2^ in. 

 long: fls. 5-7, 

 on very short 

 pedicels, before 

 the Ivs.; corolla 

 2-lipped, the two 

 lower segms. 

 narrow, divided 

 nearly to the 

 base, rose-pur- 

 ple, not spotted, 

 1-1 Y<i in. broad; 

 stamens 10. 

 April, May. 

 Newfoundland 

 to Que., south 

 to Pa. and X. J. 

 Em. 2:441. B. 

 M. 474. C.L.A. 



11:496. Gn.M. 5:221. G.W. 9, p. 474; 14, p. 85. 

 M.D.G. 1902:286: 1906:73. 



40. Vaseyi, Gray (Azalea Vaseyi, Rehd. Biltia 

 Vaseyi, Small). Fig. 3391. From 5-15 ft, high: 

 branchlets without bristles: Ivs. oblong or oblong- 

 lanceolate, acute, sparsely hirsute, 2-5 in. long: fls. 

 before the lys.; corolla rotate-campanulate, slightly 

 2-lipped, divided to below the middle, pale rose-col- 

 ored, IJ'f in. across, upper lobes spotted, lower lobes 

 widely spreading, divided nearly to the base; stamens 

 7, rarely 5. April, May. N. C. G.F. 1:377 (adapted 

 in Fig. 3391). G.C. III. 20:71; 51:313. B.M. 8081. 

 Gn. 76, p. 332; 79, p. 302. Mn. 7:121. C.L.A. 11:499. 

 Gn.M. 5:219. M.D.G. 1899:332, 333. G.W. 16, p. 

 231. A very handsome, hardy species. There is also a 

 form with white fls., var. album, Rehd., but this is not 

 quite so beautiful as the type. 



Section 6. Tstrrsrrsr (Tsusia). 



A. Corolla rotate-campanulate, divided to 



below the middle: Its. deciduous. 

 B. Lts. rhombic-ovate, acute: corolla not 



spotted 41. rhombicum 



BB. L^-s. obovate, obtuse: upper lobes of 



corolla spotted 42. Schlippen- 



AA. Corolla funnelform-campanulate: te. [bachil 



deciduous or persistent. 

 B. Inner bud-scales tiscid when un- 

 folding. 



c. Sepals obtuse, ciliate, not glandu- 

 lar 43. poukhanense 



cc. Sepals acute, lanceolate, glandular- 



ciliate 44. ledifolium 



BB. Inner bud-scales not viscid. 



c. Fls. solitary, 2-3 in. across; 

 anthers purple; sepals small, 

 ovate: hs. persistent, lustrous 



above 45. indicum 



cc. Fls. 2-3, smaller: Ivs. subpersistent 



or deciduous, dull. 

 D. Stamens 7-10, anthers purple; 

 sepals ovate to lanceolate: Its. 

 elliptic, acute, subpersistent, 



1-2 in. long 46. Simsii 



DD. Stamens 5; anthers usually 

 yellow. 



B. Lvs. deciduous, elliptic, acute, 

 l-2}4 in. long: fls. iy^-2 

 in. across, anthers yellow. .47. Kaempferi 

 EE. Lvs. subpersistent, obovate to 

 elliptic, obtuse or acutish, 

 Yz-iyt in. long: fls. ]^-l]^ 

 in. across; anthers some- 

 times purple 48. obtusum 



41. rh6mbicum, Miq. (Azalea rhdmbica, Kuntze). 

 Shrub, 3-8 ft.: Ivs. rhombic-ovate to rhombic-elliptic, 

 acute at both ends and sparsely hairy above, yellowish 

 pubescent at the nerves beneath, 1%-214 m - long: fls. 

 2-3; corolla lJ^-2 in. broad, rotate-campanulate, bright 

 rose-colored, segms. oblong, not spotted; stamens 10. 

 April, May. Japan. B.M. 6872. Gt. 17:586. G.C. III. 

 20:38. Gn. 72, p. 267. R.H. 1909, p. 79. Var. albi- 

 florum, Makino. Fls. white. 



42. Schlippenbachii, Maxim. (Azalea Schlippert- 

 bachii, Kuntze). Three to 5 ft.: branchlets glandular- 

 pilose: Ivs. cuneate, broadly obovate, 2-5 in. long, 

 rounded and mucronate at the apex, hirsute on both 

 sides or glabrous at length: fls. with the Ivs., 2-3 in. 

 broad, pale rose-colored, upper lobes spotted reddish 

 .brown; stamens 10. May. Japan. B.M. 7373. Gn. 

 46:80; 77, p. 136. G.C. III. 19:561; 55, suppl. Jan. 3. 



43. poukhanense, LeVeille (R. coreanum, Rehd.). 

 Spreading shrub, 1-3 ft. : Ivs. chartaceous, subpersistent, 

 narrow-elliptic to elliptic-lanceolate, or lanceolate at 

 the end of the branchlets, dark green above and usually 

 sparingly strigose, paler beneath and strigose on the 

 veins, 1J4-2J^ in. long: fls. 1-3; the inner scales of the 

 bud viscid; sepals J-H m - long, ovate-oblong, obtuse, 

 strigose and long-cihate; corolla funnelfonn-campanu- 

 late, pale lilac-purple, spotted purplish brown on the 

 upper lobes, about 2 in. across; stamens 10, anthers 

 purple. May. Korea. Has proved perfectly hardy at 

 the Arnold Arboretum and flowers freely as a small 

 plant ; the purple-lilac color of the fls. is unique among 

 hardy azaleas. Var. yodogawa, Rehd. (Azalea yodo- 

 gawa, Hort.). Fls. double, rosy lilac, spotted dark 

 purple: Ivs. elliptic-lanceolate. G.W. 16:163. R.H. 

 1908:425. 



44. ledifolium, Don (R. rosmarinifblium, Dipp., 

 not Vidal. Azalea 



rosmarinifolia, 

 Burm. A. alba, 

 Sweet. A. ledi- 

 folia, Hook. A. 

 liliiflora, Poit.). 

 Much -branched 

 low shrub, 1-3 

 ft,: branches, 

 Ivs. and pedicels 

 densely rufously 

 appressed - stri- 

 gose: lys. elliptic 

 or elliptic- lan- 

 ceolate, persist- 

 ent, 1-3 in. long: 

 fls. 1-3; sepals 

 lanceolate, ser- 

 rate -glandular; 

 corolla pure 

 white or rosy 

 purple, 2-3 in. 

 broad, fragrant; 

 stamens usually 

 10. May. China. 

 B.R. 811. B.M. 

 2901. L. B. C. 

 13:1253. G.28: 

 323. Gn. 33, p. 

 321. G.W. 15, p. 

 650. Some re- 

 markable varie- 3392. Rhododendron japonicum. (X%) 



