RHODODENDRON 



RHODODENDRON 



2937 



large, rose, very double and very early; Sow. du Prince 

 Albert, rich rose-peach, broadly margined white, very 

 free-flowering (P.M. 4:201. Ic". Az. 24); Theodore Rei- 

 mers, lilac, large; Vervseneana, rose, bordered white, 

 sometimes striped salmon (Gn. 52, p. 137. C.L.A. 

 5:146; 7:179. J.H. 31:423); Venaeneana alba, white 

 (R.H. 1908:424); Vuylstekeana, deep crimson, "hose- 

 in-hose." 



The varieties now chiefly imported and considered 

 the best for forcing are the following (those marked with 

 an asterisk are adapted for early forcing) : 



Single-flowered: *Emil Liebig, Haerens' Lorraine, 

 *Hexe, Professor Wolters. 



Double-flowered: *Eggebrechtii, Empereurdu Bresil, 

 Ernest Eeckhaute, *Frau Henn. Seidel, *Helene Thele- 

 mann, *Imperatrice des Indes, John Liewelyn, *Mad- 

 ame Camille Van Langenhove, Madame Jos. Vervsene, 

 *Madame Petrick, Madame Van der Cruyssen, Niobe, 

 Pharailde Mathilde, *Pres. Oswald de Kerchhove, 

 *Simon Mardner, *Verva?neana. 



Plants grown in Germany are preferred for early 

 forcing, because they are grown in pots over summer 

 before shipping, while the Belgian plants are grown in 

 the open field. Generally the Belgian plants are grown 

 more compact, while the German-grown plants are of 

 looser, more naturally graceful habit. Some varieties, 

 though much approved abroad, are rarely imported, 

 because they do not travel well. 



seruginosum, 22. 

 albiflorum, 29, 41. 

 album, 2, 17. 23, 



27, 40, 44, 48 and 



suppl. 



amcenum, 4, 8. 

 angustifolium. 20. 

 arborescens, 31. 

 arboreum, 17. 

 arbutifolium, 4. 

 atrorirens, 14. 

 atroriride, 11. 

 Augustini, 9. 

 aurarUiaca. 35. 

 aureum, 28. 

 azaleoides. 28. 

 balsamins flora, 45 



and suppl. 

 Batemanii, 22. 

 Benthamianum, 11. 

 brachycarpum, 21 



IXDEX. 

 (Including the specific names under Azalea. ) 



flavidum, 19 and obtusum, 48. 



suppL occidentale, 30. 



flamm, 36. odoratum, 28. 



fraffrans, 28 and suppL oles folium. 4. 

 gandavensis, 36. ovalifolium, 5. 



idaucum, 32 and suppl. ovatum, 5 and suppL 



Hammondii, 4. 

 Harbisonii, 6. 

 Hinodigiri, 48. 

 hirsutum, 3. 

 hispidum, 32. 

 Hymenanthes, 20. 

 \gnetcens, 46. 



pentamerum, 20. 

 phoeniceum, 44. 

 plenum, 29. 

 pomicum, 23, 36. 

 poukhanense, 43. 

 prsecox, 13. 

 pulfhrum, 44. 



indicum,44, 45, 46,47, punctaium, 6, 7. 



48., 



japonicum, 20, 38. 

 jasminiflorum, 16. 

 Kaempferi, 47. 

 Keiskei, 8. 

 Kingianum, 17. 

 lateritium, 45. 



Brtrughtonii, 28 and ledifolium, 44. 



suppL 

 calendulaceum, 35. 

 californicum, 25, 30. 

 calyciflorum, 48. 

 campanulatum, 22. 

 canadense, 39. 

 oanescens, 34. 

 carolinianum, 7. 

 catawbiense, 26. 

 caucasicum. 19. 

 cinnamomeum, 17. 

 confirm um, 11 and 



suppl. 



coreanum, 43. 

 coriaceum, 19. 

 crispiflonim, 45. 

 croceum, 35. 

 Cuthbertii, 6. 

 dahuricum, 14, 15. 

 Danidsianum. 45. 

 daphnoidef, 4. 

 ferrugineum, 2. 



lepidanthum, 11. 

 Ifucanthum. 44. 

 li Hi flora, 44. 

 limbatum. 17. 

 luteum, 33, 35, 36. 

 macranthum, 45. 

 macrophyUum, 25. 

 maximum, 27. 

 Metternichii, 20. 

 micranthum, 1. 

 minus, 6. 

 motte, 37, 38. 

 Morttri, 36. 

 Mortieriana, 36. 

 mucronulatum, 15. 

 myrtifolium, 5 and 



suppl. 



narcisaflorum. 44. 

 nilagiricum, 17. 

 nitidum, 32. 

 Xoqrdtianum, 44. 

 nudiflorum, 33. 



puniceum, 17, 44. 

 purpureum, 27, 44. 

 Pwrshii, 27. 

 racemceum, 12. 

 Rhodora, 39. 

 rhombicum, 41. 

 Rollissonii, 45. 

 rceeo-album, 19. 

 roseum, 27. 

 rosiflorum, 45. 

 Tosmarinifolium^ 44. 

 Schlippenbachii, 42. 

 sempervirens, 14. 

 Simsii, 46. 

 sinense, 37. 

 Smirnovii, 18. 

 Smiihii, 28 and suppL 

 spffiosa, 35. 

 splendens, 19. 

 stramineum, 19. 

 sutchuenense, 24. 

 Vaseyi, 40. 

 viscoeum, 32. 

 Wallichii, 22. 

 icashinfftonianum, 25. 

 Wihonii. 4 and suppL 

 Windsorii, 17. 

 yanthinum, 11. 

 yodogawa, 43. 

 yunnanense, 10. 



KEY TO THE GROUPS. 



A. Foliage etergreen, glabrous, lepidote or tomentose, 

 rarely deciduous and lepidote, not ciliate or ct/t- 

 ate and lepidote: stamens 52O; otary glabrous, 

 lepidote or tomentose, not setose, sometimes more 

 than S-ceUed. Subgenus I. EURHODODEXDROX 

 B. Lts. lepidote: ovary lepidote; stamens 510. 



Section 1. LEPIDOBHODIUM. Species Nos. 1-16 

 BB. Lts. glabrous or tomentose beneath, never lepi- 

 dote, always persistent: ovary glabrous, 

 glandular^ or tomentose; stamens 10-2O. 



Section 2. LEIORHODIUM. Species Nos. 17-28 



A. Foliage deciduous, rarely evergreen, pubescent, 

 often strigose and ciliate, rarely glabrous, never 

 lepidote: stamens 5-10; ovary setose, rarely gla- 

 brous, 5-ceUed. Subgenus II. AZALEA 

 B. Fls. from axillary buds, usually solitary; corolla 



rotate. Section 3. AZALEASTRUM. Species Xo. 29 

 BB. Fls. from terminal buds, 1 to many. 



c. Terminal bud producing only fls., usually 



many-fld.: IDS. deciduous. 

 D. Stamens 5; corolla funnelform-campanu- 

 late or funnelform. 



Section 4. PENTANTHEBA. Species Nos. 30-38 

 DD. Stamens 7-10; corotta rotate-campanulate, 

 deeply divided. 



Section 5. RHODOBA.. Species Xos. 39, 40 

 cc. Terminal bud producing fls. and leafy shoots, 

 1-3-fld.; stamens 5-10: IDS. persistent or 

 deciduous. 



Section 6. TSUTSUTSI. Species Xos. 41-48 



Subgenus I. EURHODODEXDROX. 

 Section 1. LEPIDORHODTOM. 



A. Corotta funnelform or campanulate; 

 tube shorter or not much longer than 

 lobes. 

 B. Fls. from a terminal bud, usually 



many, 

 c. Diam. of fls. %-%in. 



D. Stamens and style longer than 

 corolla, filaments glabrous; 

 fls. white, small, in a many-fld. 



dense head 1. micranthum 



DD. Stamens and style shorter than 

 corolla, filaments hairy below 

 the middle; fls. usually pink; 

 tube pubescent inside. 

 E. Style scarcely twice as long as 

 ovary: Ivs. %~2 in. long. 



F. Lts. without hairs 2. ferrugineum 



FF. Lts. ciliate 3. hirsutum 



EE. Style at least S times as long 



as ovary: Ins. 1-3 in. long. 

 F. Shape of IDS. lanceolate- 

 elliptic 4. arbutifolium 



FF. Shape of IDS. elliptic 5. myrtifolium 



cc. Diam. of fls. 1-2 in.; tube glabrous 



inside. 



D. Style and stamens shorter than 

 corolla-lobes: petioles about 

 Yiin. long. 



E. Tube of corolla longer than 

 lobes, corolla lepidote out- 

 side, spotted 6. minus 



EE. Tube of corolla shorter or as 

 long as lobes; corolla gla- 

 brous outside, usually not 



, spotted 7. carolinianum 



DD. Style exceeding the corolla-lobes: 



petioles about Hin. long. 

 E. Color of fls. yellow: Its. gla- 

 brous 8. Keiskei 



EE. Color of fls. pink, rarely white. 

 F. LTS. ciliate or hairy on the 

 midrib beneath: sta- 

 mens longer than the 

 corolla-lobes. 



G. Midrib of Its. pilose be- 

 neath; Its. glabrous 

 above: fls. rose-pink to 



purple 9. Augustini 



GO. Midrib of hs. glabrous; 

 IDS. setose above and 

 ciliate, sometimes 

 nearly glabrous: corolla 



white, spotted red 10. yunnanense 



FF. Lts. never hairy: stamens 

 somewhat shorter than 



corolla-lobes 11. yanthinum 



BB. Fls. from lateral buds usually 

 crowded at the end of the branches, 

 one or few from each bud. 

 c. Under side of Ivs. glaucous and 



lepidote: fls. about %in. across. . 12. racemosum 

 cc. Under side of Ivs. green and lepi- 

 dote: fls. 1-1 % in. across. 



