SPIR.EA 



SPIR.EA 



1701 



rower, oblanceolate: fls. smaller, yellowish white; pedi- 

 cels glabrous; petals obovate, shorter than stamens: 

 flowers somewhat earlier, but less showy. Var. flabel- 

 lata, Zabel (5. flabellata, Bertol. *S'. hypericifdlia, var. 

 crenata, Boiss. & Buhse). Lvs. obovate to obovate-lan- 

 ceolate, acute, incisely serrate at the apex or entire on 

 the flowering branches. Var. obovata, Maxim. (S. obo- 

 vata, Waldst. & Kit.). Lvs. obovate, rounded at the 

 apex, crenate above the middle. S. E. Eu. Var. trun- 

 cata, Zabel {S. thalietroldes, Hort., not Pall.). Lvs. 

 broadly obovate to oblong - obovate, truncate and cre- 

 nately dentate at the apex. Siberia. 



2363. 



Spiraea Thunbereii 



' (XK.) 



3. Thunbergii, Sieb. Fig. 2363. Shrub, 5 ft. high, with 

 spreading or arching branches: lvs. sharply serrulate, 

 1-1% in. long: fls. pure white, about % in. across, in 

 3-5-fld. naked umbels ; petals obovate, much longer than 

 stamens: follicles with the spreading styles below the 

 apex. April, May. China, Japan. S.Z. 1:69. G. P. 8:84, 

 85. — A very graceful early-flowering shrub, the slender 

 arching branches clothed with feathery bright green 

 foliage, turning late in fall to orange or scarlet. Almost 

 hardy, but tips of branches sometimes killed by severe 

 frost; valuable for seaside planting. 



4. arg"uta, Zabel(S. Thunbergii x multifldra). Similar 

 in habit to the former but higher and more vigorous: 

 lvs. oblong-obovate to oblong-oblanceolate, sharply and 

 sometimes doubly serrate, glabrous at length, 1-1% in. 

 long: fls. pure white, % in. across, in many-fld. umbels, 

 mostly with small lvs. at the base; pedicels glabrous; 

 petals broadly obovate, almost twice as long as stamens. 

 May. Of garden origin. G.C. III. 22:3. Gng. 7:291. 

 F.E. 11:160. G.F. 10:443. M.D.G. 1900:16. -The most 

 free-flowering and showy of the earlier Spireas; quite 

 hardy. 



5. multifldra, Zabel (S. crenata x hypericifdlia). 

 Shrub, 5 ft. high, with slender, arching branches : lvs. 

 obovate, cuneate, serrate above the middle, usually 3- 

 nerved, glabrous at length, about 1 in. long: fls. pure 

 white, in many-fld. umbels, sessile on the upper, borne 

 on leafy stalks on the lower part of the branches. May. 

 Of garden origin.— Handsome shrub similar to the 

 former, but blooming a little later. 



6. prunifdlia, Sieb. & Zuec. Graceful shrub, 6 ft. 

 high, with upright slender pubescent branches: lvs. 

 ovate to oblong, denticulate, pubescent beneath, 1-2 in. 

 long: fls. pure white, about % in. across, on slender 

 pedicels, in 3-6-fld. umbels; petals obovate, longer than 

 stamens. May. China, Japan. — Var. fibre pleno. Fig. 

 2364. Fls. double, rather large. S.Z. 1:70. F.S. 2:153. 

 Gn. 53, p. 185. A.G. 18:425. F.E. 9:593. Mn. 3, p. 42. 

 Very handsome, early-flowering shrub, with dark green, 

 shining foliage, turning orange in fall. The single-fld. 

 form is less showy and rare in cult. ; its foliage is lighter 

 and not shining. 



7. cana, Waldst. & Kit. Dense, bushy shrub, 3 ft. 

 high: lvs. elliptic to oblong, acute at both ends, usually 

 entire, grayish pubescent on both sides, more densely 



beneath, X-l in. long: fls. Vi in. across, in dense head- 

 like umbels; petals about as long as stamens; sepals 

 reflexed in fruit. May. S. E. Eu., W. Asia. — Hardy, 

 but not very showy. 



8. alpina, Pall. Shrub, 4 ft. high, with upright or 

 arching, angular, reddish brown branches: lvs. oblong- 

 obovate to oblanceolate, acute, usually entire, glabrous, 

 penninerved, %-l in. long: tis. white, rather small, in 

 short-stalked, small glabrous umbels; petals roundish, 

 little shorter than stamens; sepals upright in fr. : folli- 

 cles curving outward. May, June. N. E. Asia. — Hardy 

 shrub, with graceful foliage. 



9. crenata, Linn. (S. crenifdlia, C. A. Mey.). Shrub, 



3 ft. high, with slender striped branches: lvs. oblong- 

 obovate to oblanceolate, acute at both ends, crenately 

 serrate toward the apex, grayish green, puberulous be- 

 neath when young, 3-nerved, %-l% in. long: fls. white, 

 rather small, in dense almost semi-globose umbels; pet- 

 als roundish obovate, shorter than stamens: sepals up- 

 right in fr. : follicles with erect styles. May. S. E. Eu. 

 to Caucasus and Altai. L.B.C. 13:1252. — Hardy. 



10. Pikowiensis, Bess. (S. crenata x media. S.JVicou- 

 diirti, Hort.). Shrub, 4 ft. high, with terete upright 

 branches: lvs. oblong, cuneate at base, with few sharp 

 teeth at the apex or sometimes entire, penninerved to 

 3-nerved, almost glabrous, 1-2 in. long: fls. white or 

 greenish white, in many-fld. almost glabrous umbels; 

 petals orbicular, shorter than stamens; sepals upright 

 in fr. ; follicles with the upright style somewhat below 

 the apex. May. — Supposed natural hybrid, found wild in 

 Podolia, in Poland. 



11. bracteata, Zabel (S. Nipp6nica, Maxim. S. media, 

 var. rotundifdlia, Nichols.). Shrub, 8 ft. high, with 

 upright or spreading branches, quite glabrous: lvs. 

 roundish obovate, usually crenate at the apex, dark 

 green above, bluish green beneath, of firm texture, 

 %-!% in. long: fls. over % in. across, in umbel-like ra- 

 cemes, sometimes compound at the base; petals orbicu- 

 lar, longer than stamens; sepals spreading in fr. June. 

 Japan. G.C. II. 23:283. -Desirable hardy shrub of vig- 

 orous growth with showy umbels of pure white fls. and 

 dark green handsome foliage remaining fresh until late 

 in fall. 



12. Blumei, G. Don (S. rupe'stris, Sieb.). Shrub, 



4 ft. high, with spreading and arching branches: lvs 

 ovate to rhombic-ovate, incisely crenate-serrate, pale 

 bluish green beneath and rather prominently veined, 

 %~1% in. long: fls. polygamous, white, in many-fld. 

 umbels; petals roundish obovate, about as long as sta- 

 mens: follicles with spreading or reflexed styles. June, 

 Japan. B.H. 8:36. — Not hardy north, rare in cultiva- 

 tion; often the following or other species are met with 

 under its names. 



2364. 

 Spiraea prunifolia. 

 flore pleno (XK). 



13. trilobata, Linn. (S. triloba, Linn.). Fig. 2365. 

 Shrub, 4 ft. high, with slender spreading branches: lvs. 

 almost orbicular, incised-dentate and often 3-lobed, 

 obtuse, pale bluish green beneath, K-l in. long: fls. 

 pure white, in many-fld. umbels ; sepals upright in fr. : 

 follicles with ascending styles. Mav, June. N. China 

 to Siberia and Turkestan, L.B.C. 13:1271. G.F. 1:452.- 



