1704 



SPIK^A 



31. albifldra, Miq. {S. Japonim alba, Kegel. S. leu- 

 cdntfia, Lange). Fig. 23G7. Low shrub, Hi ft. high, 

 with stiff, upright branches: Its. lanceolate, coarsely 

 or sometimes doubly serrate, glabrous, 1-2 in. long: fls. 

 white, in dense corymbs, one large terminal and many 

 smaller ones below, forming a kind of raceme; disk 

 prominent; sepals reflesed in fr. : follicles upright, not 

 or little diverging. July, Aug. Japan. 



32. supdrba, Zabel (S. albifldra x corymbdsa). Low 

 shrub, with striped dark brown branches : Ivs. elliptic- 

 oblong to oblong, acute at both ends, simply or doubly 

 serrate, almost glabrous, 1-3 in. long: fls. rather large, 

 pink or almost whitish; disk prominent; petals orbicu- 

 lar or broadly obovate. June, July. Of garden origin. 



2367. Spirasa albiflora (XK) 



33. corymbdsa, Raf. {S. cmhegifblia, Link.). Low 

 shrub, with usually little-branched stems, rarely to 3 

 ft. high: branches purplLsh brown: Ivs. broadly oval to 

 ovate, acutish, coarsely and often doubly serrate, espe- 

 cially above the middle, pale bluish green beneath and 

 glabrous, l!^-3 in. long: fls. white, rather small, in 

 somewhat convex usually pubescent corymbs, l}4-3 in. 

 across; petals oval: follicles and styles upright. May, 

 June. N. J. to Ga. L.B.C. 7:671. 



34. liioida, Dougl. Closely allied to the former: 

 branches yellowish brown or brown: Ivs. more incisely 

 serrate, oval or obovate: corymb glabrous, usually 

 looser and more flat, broader. June, July. Dakota to 

 Brit. Col. and Oregon. The allied S. Virginiina, 

 Britt., is more branched and higher: Ivs. ohhms to ob- 

 lanceolate, dentate above the middle or almost entire : 

 inflorescence glabrous. Va. to N. C. B.B. 2:197. 



35. betulifblia, Pall. Low, much-branched shrub: Ivs. 

 oval to obovate or obovate-oblong, usually cuneate at 

 base and very short-petioled. serrate or crenately ser- 

 rate, obtuse, glabrous or slightly pubescent on the veins 

 beneath, %-l% in. long: corymb usually glabrous, 1-2 



Kams- 

 i foUow- 

 ered by 



(•«, Gray. 



SPIRAEA 



in. across. June, July. Siberia t 

 chatka and Japan. — The two |.rcc( 

 ing species are all closely aliir.l 

 some botanists as varieties of N. h 



36. densifldra, Nutt. {S. bcliiUK 

 S. rdsea, Koehne. S. arbuscnUi, Greene). Lov 

 branched shrub: Ivs. very short-petioled, oval to ovate, 

 obtuse, crenately serrate, %-!% in. long: fls. bright 

 pink, in dense corymbs 1-2 in. across. June-Aug. Ore. 

 to Calif., southern Manchuria. G.P. 10:413. 



Section 5. Spiraria (Species Nos. 37-49). 

 A. Inflorescence a broad panicle, 

 about as broad as high. (Hybrids 

 of species of this and the preced- 



B. Piinirles rather small, on lateral 

 hranehlets at the end of last 



i/ear's branches :i7. Fontenaysii 



BB, PtDiicli'H large, terminal on long, 

 npright branches. 

 c. -Lvs. glabrous or nearly so. 



D. Apex of lvs. acute 38. conspicua 



UD. Apex of lvs. obtuse or 

 acutish. 

 E. Shape of Irs. hroa.lhj 



oviitr ■•!■ ,'h,.r<il, lilt, notha 



EE. Shall, uf Irs. ohl,,,i,l or 



oviil-i'i,Uiii:j 40. pyramidata 



CC. Lvs. pubescent ur tviiieutose 

 beneath. 



D. Base of lvs. acute 41. SansBouciana 



DD. Base of Ivs. rounded 42. Nobleana 



AA. Panirler, elongated, longer than 



B. Fnli.nir ijlui.nnis or nearly so. 

 c. Li-s. s!rir/>I'i srrrate, except 

 at Ihr rrl-ll hose. 

 D. Panicles tomentnlose. 



E. Fls. light pink 43. salicifolia 



EE. Fls. white 44. alba 



DD. Panicles glabrous 4.5. latlfolia 



CO. Lvs. coarsely serrate above 



the middle: fls. pink 46. Menziesii 



BB. Foliage pubescent or tomentose 

 beneath. 

 c. Follicles glabrous: lvs. gray- 

 ish or whitish tomentose be- 

 neath. 



D. Lvs. acute at both ends 47. Billardii 



DD. Lvs. rounded or nearly so 



at both ends 48. Douglasi 



CO. Follicles pubescent: lvs. usu- 

 ally light tawny beneafh.i9. tomentosa 



37. Fontenaysii, Billard {S. Fontanaysiinsis. Dipp. 

 S.caniscens x salicifolia). Shrub, 6 ft. high, with slen- 

 der, upright branches : lvs. oval or oblong-oval, rounded 

 at both ends, crenately serrate above the middle, pale 

 bluish green beneath, almost glabrous, 1-2 in. long: fls. 

 white or pink, in lK-3-iu. long panicles; petals orbicu- 

 lar, about as long as stamens; sepals spreading in fruit. 

 June, July. Of garden origin. — Not quite hardy north. 

 Var. 41ba, Zabel, is the white-fld., var. rdsea, Zabel, the 

 pink-fld. form. S. pruindsa, Hort. (S. brachybdtrys, 

 Lange. S. Uixuridsa, Hort. S.caniscens x DoHglasi), 

 is a similar form, but the lvs. are tomentose beneath and 

 the fls. pink. 



38. consplcua, Zabel {S. albifldra x dlba). Upright 

 shrub, 3 ft. high, with dark brown puberulous branche 



white, in broad finely pubescent panicles; petals shorter 

 than stamens. July-Sept. — Handsome form. A similar 

 hybrid is S. syringaendra, Lem. (L. albifldra x salici- 

 folia], with oblong-lanceolate or lanceolate ivs. serrate 

 above the middle and pink fls. Cbi-i l> uMi' a i- :dso 

 S. semperfldrens, Zabel {S. Jap6iur<^ S. 



Japinicaov F6rtunei,va.x. paniculiili . II i i 1 1 1m r 



than the former: lvs. oblong-lanceolai. . ii-u:ii[\ o.ul.ly 

 serrate: fls. pink. R.H. 18B0, p. 496, 4;i7. (..u. 4... p. 48. 



