Handsome bushy shrub, quite hardy; cult, under many 

 different names as S. aquilegifdlia, adiantifblia, cra- 

 tagifdlia, Blitmei. 



14. Van Hoiittei, Zabel (S. Cantonilnsis xMlobAta. 

 S. aquilegifdlia, VHT. Van HolUtei, Briot.). Pig. 2366. 

 Shrub, 6 ft. high, with arching branches : Ivs. rhom- 

 bic-ovato or rhombio-obovate, rounded or somewhat 

 narrowed at the base, acute, incised serrate, dark green 

 above to pale bluish green beneath, %-lK in. long: fls. 

 white, % in. across, in many-fld. umbels; petals twice 

 as long as stamens; sepals upright or spreading in 

 fruit. May, June. Of garden origin. Gn. 53, p. 251. 

 G.F. 2:317. Gng. 5:210. A.G. 15:297. P.G. 3:173. 

 M.D.G. 1900:17.-This is one of the most beautiful, or 

 perhaps the most beautiful, of the early-blooming 

 Spireas and quite hardy. Sometimes confounded with 

 the foregoing, which is similar but smaller in every 

 part and less showy. 



15. CantoniSnsis, Lour. (S. Eeevesi&na, Lindl. S. 

 lanceoWa, Poir. S. corymMsa, Rosb.). Shrub, 4 ft! 

 high, with slender, arching branches: Ivs. rhombic- 

 lanceolate, incisely doubly serrate, dark green above, 

 pale bluish green beneath, 1-2}^ in. long: fls. over K in. 

 across, in rather dense umbels; sepals upright in fruit: 

 follicles with spreading styles. May, June. China, 

 Japan. B.R. 30:10. A.G. 18:356.-Very handsome 

 shrub, with large pure white fls., but only half-hardy 

 north. Var. fldre plfino, with double fls. and narrower 

 Ivs., is still more tender. This species and the three 

 foregoing are valuable also for their handsome foliage, 

 which remains fresh and green until late in fall. 



16. bUnda, Zabel (S. Chininsis x Cantoniinsis. S. 

 Heevesidna robtista, or ndva, Hort. ) . Upright shrub, 6 ft. 

 high, with arching branches: Ivs. oblong to ovate, acute 

 at both ends, incised serrate, dark green and almost 

 glabrous above, grayish tomentose beneath, 1-lJ^ in. 

 long: fls. rather large, pure white, in pubescent umbels; 

 sepals ovate-lanceolate, upright in fruit: follicles pu- 

 bescent, with spreading styles. May, June. Of garden 

 origin.— Only half-hardy north. 



17. Chin^nsis.Maxim. (S.p)j6^sce«s, Lindl.). Upright 

 shrub, 5 ft. high, with arching branches, tomentose 

 when young: Ivs. long-petioled, ovate, incisely serrate 

 and sometimes 3-lobed, finely pubescent above, yellowish 

 tomentose beneath, 1-2 in. long: fls. pure white, about 

 X in. across, in pubescent umbels; sepals upright in 

 fruit, ovate-lanceolate, tomentose like the follicles- 

 styles terminal, spreading. May. China. B.R. 33:38.- 

 Handsome, but not hardy north. 



18. pub6scens, Turcz. Upright shrub, 6 ft. high, with 

 slender, arching branches: Ivs. similar to those of the 

 foregoing species, but more grayish tomentose beneath 

 and somewhat smaller, petioles shorter: fls. H-^ in. 

 across, in glabrous umbels; sepals triangular-ovate, 

 upright in fruit: follicles glabrous, with the spreading 

 styles below the apex. May. N.China. G.F. 1:331. — 

 Hardy north, and the large-fld. form as handsome as 

 the foregoing species. 



brous or pubescent when young: Ivs. ovate to oblong, 

 euneate at the base, incisely serrate above the middle, 

 almost glabrous or pubescent, 1-2M in. long: fls in 

 many-fld. rather long-stalked, umbel-like racemes; fol- 

 licles with the spreading or reflexed styles somewhat 

 below the apex. May. S. E. Eu. to Japan. -Var. gla- 

 br^scens, Zabel. Almost glabrous. Var. oblongifdlia, 

 Rehd. (S. oblongifolia, Waldst. & Kit.). Lvs. elliptic- 

 oblong to oblong-lanceolate, narrowed at both ends, en- 

 tire or with 1-3 teeth at the apex. Var. serloea, Regel 

 {S. sericea, Turcz.). Lvs. pubescent on both sides. 



20. chamsBdryfdlia, Linn. Shrub, 6 ft. high, with 

 angular, glabrous branches: lvs. distinctly petioled, 

 ovate to lanceolate, sharply and often doubly serrate, 

 almost glabrous, bluish green beneath, 2-3 in."long: fls. 

 in many-fld. umbels, the lower ones long-stalked, the 

 upper ones often almost sessile: follicles with the styles 

 upright and terminal. S. E. Eu. to Japan. -Var. flex- 

 udsa, Maxim. (S. flexudsa, Fisch.). Less high, with 

 spreading more or less zigzag branches: lvs. narrower, 

 sharply serrate above the middle. Siberia to Dahuria. 



SPIR^A 



Var. ulmifdiia, Maxim. (S. ulmifblia, Scop.). Upright- 

 lvs ovate, incisely or doubly serrate from below the 

 middle: fls. larger, about y^ in. across, appearing later. 

 L.B.C. 11:1042. B.R. 15:1222. Both v^rs. are often 

 cult.; they spread, like the preceding species, by 

 suckers. Sometimes as S. atrifolia or aubifolia in 

 gardens. 



Section 4. Calospiha (Species Nos. 21-36). 

 A. Stamens as long as petals: lvs. 

 small, 1^-/ ;„. ln,,g: fls. white. 

 E. Heiphl .i-i:. nrcfixioiiniiy I'Z ft... 21. canescens 



BB. Height •ilunit > ,, ft 22. decumbens 



AA. Stameii.i hnifirr than jutiils. 



B. Corgiiih.s un lultral branchlets 

 along the branches of the pre- 



C. Winter-buds slender, longer 



than petioles 23. longigemmis 



CO. Winter - buds shorter t h a n 

 petioles. 

 D. Shoots angular: lvs. usu- 

 ally broadly ovate 24. bella 



DD. Shoots terete : lvs. usually 



ovate-lanceolate 25. expansa 



BB. Corymbs terminal on upright 

 shoots of the year. 

 c. Inflorescence ptibescent, 

 rarely glabrous, very com- 

 pound, besides the terminal 

 corymb lateral ones bloom- 

 ing somewhat later appear 

 beneath it, only weak 

 branches with a single 

 corymb. 

 D. Shrub 1 ft. or less high, 

 u'ith bullate lvs. less than 



1 ill- long 26. buUata 



DD. Shrubs 1-5 ft. high, with 

 larger lvs. 

 E. Branches terete. 



F. Ripe follicles di- 

 verging 27. Japonica 



FF. Bipe follicles upright, 

 straight. 



G. Fls. pink 28. Margaritae 



GO. Fls. whitish or 



blll.<:herl 29. Foxii 



EE. Branches more or less 

 angular, rather stiff, 

 almost glabrous. 

 F. Color of fls. pink, 



rarely whitish 30. Bumalda 



FF. Color of fls. white ....31. albiflora 

 CC. Inflorescence usually gla- 

 brous, consisting of only one 

 terminal corymb: follicles 

 not diverging. 

 D. Sepals reflexed in fruit: 



petals orbicular 32. Buperba 



DD. Sepals spreading or half 

 upright .- petals oval to 

 oblong. 

 E. Fls. white. 



F. Corymb usually pu- 

 bescent 33. corymbosa 



FF. Corymb usually gla- 

 brous. 

 G. Ia^s. usually in- 



cised-serrate 34. lucida 



GO. Bi'S. usually ere- 



nately serrate 35. betuliiolia 



EE. Fls.2>ink 36. denBiilora 



21. canescens, D. Don. Shrub, 6 or sometimes 12 ft. 

 high, with spreading and arching branches: lvs. broadly 

 oval to obovate, very short-petioled, crenately dentate 

 above the middle, grayish green, pubescent beneath or 

 sometimes almost glabrous at length, l^-% in. long: 

 fls. white, rather small, in dense, semi-globose corymbs 

 to 2 in. across, appearing very profusely along the 

 branches; sepals upright or spreading in fr. : follicles 

 villous, with the ascending styles a little below the 



