HYDRANGEA 



them sterile. — The greenhouse Hydrangea. June, July, 

 but blooming in winter under glass. A large number of 

 varieties have been introduced from Japan and China, 

 where this species has been extensivel)' cultivated for 

 many centuries, and where it is native. The following 

 are some of the best known. They may be divided into 

 3 groups : 



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

 flow ei s 

 Var acuminata A Gmv (IT nn m vtitn ^leb & 

 Zucc ff Bmj ^ K 7 f , ] p 



late acuminate i le 



fls with ellipti 

 Var Azisai M 

 ovate glabi us 



pedieelled o\ ert j j i „ 1 I / 1 \ 



Belzdni Maxim {IT Bel ^ V / Hi 



ica var caei ilea Hook // / 



ceils Re 1 I ( 1 it I 1 I t 



or ol It Ihi k 



all} 



Lvs 

 broall 



1 elongs 



RH 



Sel ) 



epil' 



\ maciosepala Rf,l Dif 

 fers Ii 1 t r I 1 1 pil Gt 



li o''0 \ \r Miriesi H it «f ras al o net much differ 

 ent 1 ut has somewhat broader lvs and the pmk sterile 

 fls are ver) large 3 3}^ m d ross Gn 54 119b G L 

 III 2i ippl '8 \ar rosdlba, \ an Houtte (H L t d 

 lej H rt ) Lvb ovate or elliptic ovate acuminate 

 spar 1 f,h hiii-y sepals dentate ovate or broadly ovate 

 white 111] ik r \shitt changing to pmk S S lb lb49- 

 50 R H Ibf I 4dO Gn 46 990 Var Berr&ta Rehd 

 (H 6f (/(,DC B Tliunberg I, Sieh & Zucc S ry i 

 nea, Hort.). Lvs. elliptic or ovate, narrowed at both 

 ends, serrate, sparingly appressed-hairy, lH-3 in. long: 

 cymes small, 3-4 in. broad : fls. pinki.sh or bluish ; sepals 

 roundish, obtuse or emarginate. S.Z.58. G.C. 1870:1699. 

 (2) ITortensla group: cymes glohoscy with almost all 

 fls. sterile. 

 Var. nigra, Arb. Kew. (IT. Mandshilriea, Koehne. 

 R. opuloldes, var. cyandclaila, Dipp. H. nigra, Carr. 



dark purple or violet, ot'ttii alTji..vt l,l;„■l^ : lvs. ovate- 

 elliptic, acute: cymes large, wiili jniipli' p.-duncles: se- 

 pals pink or bluish, obovatt-. A.F. r)::;iHi. Var. Hort6n- 

 Sia, Maxim. Lvs. large, elliptic, glabrous : sepals 

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

 which first came into cultivation outside of Japan and 

 China, and is said to have been introduced from China to 

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

 24:45. Gn. 45, p. 12; 50, pp. 123, 250, 367; 52:281. Var. 

 OtAksa, Maxim. (H. Otalcsa, Sieb. & Zucc). Fig. 1113. 

 Dwarfer, but of vigorous growth: lvs. obovate, short- 



^^f.- ,.. 



HYDRANGEA 785 



acuminate, rather thick glabrous sepals obovate en- 

 tire, pink or blue S Z 52 F b 17 1732-33 Gn 50 1079. 

 R.H.1868:4oO AIn o p lOo A G 11 415 A F 10 1015. 

 F.E. 9:52 and 401 Gng 5 Ibl \ ai pl§na Rgl Similar 



1113 Hydrangea horteni 



to var. Hortensia, but sepals toothed. Var. Thomas 

 Hoggr, Hort. Lvs. elliptic or ovate, rather small: heads 

 large, pure white. This variety is somewhat dwarfer 

 than the common Hydrangea and is, besides Otaksa, 

 the best as a pot-plant. It is also to be recommended 

 for outdoor cultivation, as it is one of the hardiest. 



(3) Stellata group: fh 

 Var. stellata, Maxim 

 Lvs. ovate or ovatf nl 

 with larger sterile n 

 .■llii.tn 



sepal. 



■ith 



proliEera, 



\,.i Jimbriata, 

 -t .ill the fls. 



Dipp. Cy 



G.C. III. 2 



lata.vnT.j 



few .smaller .111. - 111 I., r .,, nn:. V;ir. rubro-plena, Dipp. 

 Cymes rather d.-iisr, vith almost all fls. sterile, chang- 

 ing from pink or pale lilac to dark red. 



There are also some varieties with variegated lvs., as 

 var variegata, Regel a form of var Belzoni with the 

 hs edged white (I< "^ 7 096) var tricolor, Hort , with 

 the lvs variegated with white ind edged }ellow, var 

 rdseo-marginata, Hort with the h^ spotted white and 

 edged pink 



cc Cyme enclosed befoie expandtng by 6-8 

 latgi , decidiious bracts 



8 mvolucTata Sieb Low shrub to 5 ft 



ally 2 Au^ lap S Z 0' II M 



H Siipphtx introduced 18'l» I 



to belong here A ar hort^nsis M n I i 



doub]( usualh pmk and otten prolittrous 



S Z 04 F s i 1S7 



AA Climbing hi/ iieiial tootlets stamens 15 



pttaU cup like, cohering, falling off as 



a It hole 



1112 Hydrangea paniculata var grandiflora 



