HYDRANGEA 



HYDRANGEA 



1621 



DD. Fertile fls. bluish or pink: Ivs. glabrous or pubescent 

 only on the veins below. 



6. Davidii, Franch. Shrub, to 6 ft.: young branch- 

 lets finely appressed pubescent, older light brown: Ivs. 

 elliptic-lanceolate or ovate-lanceolate, long-acuminate, 

 cuneate at the base, sinuately serrate, yellowish green 

 and nearly glabrous above, pubescent on the veins 

 below, 3^|-6 in. long: corymbs loose, convex, some- 

 times nearly paniculate, 6-8 in. across; sepals and 

 petals lanceolate; sterile fls. about 1^ in. across, with 

 3 or 4 sepals: caps, with the margin of the calyx about 

 or slightly below the middle. W. China. Handsome 

 species with its large loose corymbs of blue fls.; tender. 



7. opuloides, Koch (H. hortensis, Smith. H. Hor- 

 tensia, DC. H. japdnica, Sieb.). Shrub, to 8 ft., almost 

 glabrous: Ivs. ovate or ovate-elliptic, acuminate or 

 acute, coarsely serrate, 5-8 in. long: fls. in large cymes 

 without bracts, white, bluish or pink, few or all of 

 them sterile. The greenhouse hydrangea. June, July, 

 but blooming in winter under glass. A large number of 

 varieties have been intro. from Japan and China, 

 where this species has been extensively cult, for 

 many centuries, and where it is native. The follow- 

 ing are some of the best known. They may be 

 divided into 3 groups: 



(1) Japonica group: cymes flat, with sterile and 

 fertile fls. 



Var. acuminata, Dipp. (H. acumindta, Sieb. & Zucc. ^ 

 H. Buergeri, Sieb. & Zucc.). Lvs. ovate-lanceolate, 

 acuminate, sparingly appressed-pubescent : sterile fls. 

 with elliptic entire sepals, usually blue. S.Z. 56, 57. 

 Var. Azisai, Dipp. (H. Azisai, Sieb.). Lvs. elliptic- 

 ovate, glabrous: sterile fls. with obovate sepals, long- 

 pedicelled, overtopping the fertile ones. S.Z. 51. Var 

 Belzdnii, Schneid. (H. Belzdnii, Sieb. & Zucc. H. 

 japdnica var. c&rulea, Hook. H. japonica var. cserules- 

 cens, Regel). Of dwarf er and stouter habit: Ivs. ovate 

 or obovate, short-acuminate, glabrous, somewhat thick : 

 sterile fls. whitish, pinkish, or bluish, with rhombic, 

 usually entire sepals. S.Z. 55. B.M. 4253. Here 

 belongs also var. Imperatrice Eugenie with pink fls. 

 R.H. 1868:471. Var. jap6nica, Schneid. (H. japdnica, 

 Sieb.). Lvs. ovate to elliptic, acuminate, glabrous: 

 sepals broadly ovate, toothed, pink. S.Z. 53. B.R. 

 30:61. R.H. 1874:90 (as H. acuminata). Var. macro- 

 sepala, Dipp. Differs from the former only by its 

 larger sepals. Gt. 15:520. Var. Mariesi, Hort., seems 

 also not much different, but has somewhat broader 

 Ivs., and the pink sterile fls. are very large. Gn. 54: 

 390. G.C. III. 23, suppl. May 28. G. 26:409. G.M. 

 41:347; 46:577, 578. G.W. 6, p. 557; 9, pp. 413, 414. 

 Var. Veitchii, Hort. Similar to the preceding variety, 

 but sterile fls. pure white, 3-3 ^ in. across. G. 26:175. 

 Var. Lindleylna, Rehd. (H. rosdlba, Van Houtte. H. 

 hortensis var. Lindleyana, Nichols.) . Lvs. ovate or ellip- 

 tic-ovate, acuminate, sparingly hairy: sepals dentate, 

 ovate or broadly ovate, white and pink, or white 

 changing to pink. F.S. 16:1649, 16.50. R.H. 1866:430. 

 Gn. 46:466. Var. serrata, Rehd. (H. serrdta, DC. H. 

 Thiinbergii, Sieb. & Zucc. H. cyanea, Hort.). Lvs. ellip- 

 tic or ovate, narrowed at both ends, serrate, sparingly 

 appressed-hairy, 1J4-3 in. long: cymes small, 3-4 in. 

 broad; fls. pinkish or bluish; sepals roundish, obtuse or 

 emarginate. S.Z. 58. G.C. 1870:1699. 



(2} Hortensia group: cymes globose, with almost all 



fls. sterile. 



Var. cyanoclada, Dipp. (H. mandshurica, Koehne. 

 H. Hortensia var. nigra, Arb. Kew. H. nigra, Carr. 

 H. rdmulis coccineis and H. rdmulis pictis, Hort.). 

 Branches dark purple or v-iolet, often almost black: Ivs. 

 ovate-elliptic, acute: cymes large, with purple pedun- 

 cles; sepals pink or bluish, obovate. A.F. 5:361. Var. 

 Hortensia, Dipp. Lvs. large, elliptic, glabrous: sepals 

 broadly ovate, entire, usually pink. This is the form 



which fir-st came into cult, outside of Japan and China, 

 and is said to have been intro. from China to England 

 in 1790, by Joseph Banks. B.M. 438. G.C. III. 

 24:45; 52:251. Gn. 45, p. 12; 50, pp. 123, 256, 367; 

 52, p. 281. F.E. 18:277. A.G. 1900:695. Gn.M. 2:66. 



1931. Hydrangea panicu- 

 lata var. prsecox. 



(XH) 



G. 4:223; 15:139; 20:441. Var. plena, Regel. Similar 

 to the preceding, but sepals toothed. Var. otaksa, 

 Dipp. (H. otaksa, Sieb. & Zucc.). Fig. 1933. Dwarf er, 

 but of vigorous growth: Ivs. obovate, short-acumi- 

 nate, rather thick, glabrous: sepals obovate, entire, 

 , pink or blue. S.Z. 52. F.S. 17:1732, 1733. Gn. 50: 

 122. R.H. 1868:450. Mn. 5, p. 105. A.G. 11:415; 19: 

 suppl. Feb. 12; 44:415. A.F. 10:1015. F.E. 9:52, 

 401. Gng. 5:161; 6:7. Here belong also the following 

 4 forms: Var. otdksa monstrbsa, Lambert, with very 

 large heads. S.H. 2:517. G.W. 13, p. 43. Var. otdksa 

 monstrbsa nana, Brunnemann. A very dwarf form of 

 the preceding. M.D.G. 1909:235. Var. rbsea, Veitch. 

 Lvs. smaller, more finely serrate: fls. deep rose-color 

 or bright blue. Gt. 53:1533 (rose). R.H. 1904:544 

 (blue). Gn. 50:122. G.W. 7:582. Gn.W. 22:493. 

 Var. Thomas Hogg, Hort. Lvs. elliptic, or ovate: heads 

 pure white, large. One of the best as a pot-plant. It is 

 also to be recommended for outdoor cult., as it is one 

 of the hardiest. Some beautiful forms mostly of 

 hybrid origin of the Hortensia group have recently 

 appeared in the trade, of these may be mentioned here : 

 Madame E. Mouillere, white fls. with crenate close 

 sepals. R.H. 1912, p. 62. M.D.G. 1911:41. G.C. III. 

 49:204. Gn. 75, p. 180. Beaute Vendomoise, fls. very 

 large, with clawed and crenate sepals, fls. therefore 

 open in the center. R.H. 1912, p. 63. Professor D. 

 Bois, fls. deep rose, large, sometimes 5 in. across. R.H. 

 1912, p. 325. Eclaireur, fls. large, rose-carmine, said to 

 be the most deeply colored form. Mademoiselle Renee 

 Gaillard, fls. white with dentate sepals. M.D.G. 1911: 

 38, 39. Avalanche, fls. pure white. Generale Vicomtesse 

 de Vibraye, with very large pink fls., with entire sepals. 

 R.B. 37:377. President Viger, very floriferous, clusters 

 large, fls. very large, with dentate sepals, bright pink. 

 Saarbrucken, dwarf, with very large heads of pink fls. ; 

 sepals denticulate. M.D.G. 1910:601. G.W. 15, p. 76. 

 For other varieties see: M.D.G. 1911:38-41,265-273; 

 1912:210, 211. 



