This section is from the book "The Standard Cyclopedia Of Horticulture Vol2", by L. H. Bailey. See also: Western Garden Book: More than 8,000 Plants - The Right Plants for Your Climate - Tips from Western Garden Experts.
Shrub, to 6 ft.: leaves elliptic-ovate to elliptic-oblong, short-acuminate, sharply serrulate, stellate-tomentose and whitish below, 1 1/2-3 in. long: panicles broadly pyramidal; flowers nearly 1/2in. long, white; stamens nearly as long as the petals; calyx-lobes deciduous. Cent. China. variety laxiflora, Rehd. Leaves oblong-lanceolate, acuminate, remotely denticulate, rough-pubescent above, thinly stellate-pubescent beneath and light green: panicles broad and rather loose, 2 1/2-3 1/2 in. long; flowers about 1/2in. long. June. W. China. - Only the variety is in cultivation; similar to D. scabra, but the panicles looser and more graceful.
ee. Calyx-lobes longer than the tube.
(D. scabra x D. Vilmorinae. D. crenata magnifica, Lemoine). Leaves ovate-oblong, acuminate, appressed-serrulate, rough above, stellate-tomentose and grayish green below, 1 1/2-2 1/2 in. long: flowers in erect panicles, white, double; sepals ovate or ovate-oblong, about as long as calyx, acute. June. G.M. 53:108. F.E. 31:322. variety latiflora, Rehd., with very large single flowers 1 1/2 in. across. variety superba, Rehd., with large single campanulate flowers variety eburnea, with white single campanulate flowers in loose panicles; stamens slightly shorter than petals. variety erecta, Rehd., with white flowers in dense panicles. variety formosa, Rehd., with double white flowers in large panicles. These varieties were originally described as vars. of D. crenata.
dd. Filaments, at least the longer ones, subulate, without teeth.
(D. scabra, Sieb. & Zucc, not Thunb.). Low shrub, to 2 ft.: leaves short-petioled, the pair below the panicle nearly sessile, ovate or ovate-elliptic to oblong-ovate, rounded or cordate at the base, rough and rugose above, stellate-pubescent and light green beneath, 1-2 in long: panicles erect, loose, 2-3 in. long with appressed stellate pubescence mixed with spreading simple hairs; flowers white, rather small, with spreading petals; the shorter filaments usually abruptly contracted or with very short teeth; calyx-lobes persistent. June. Japan. S.Z. 7. G.C.III.36:244. variety Dippeliana, Schneid. (D. scabra vera, Hort.). Leaves broader and smaller: panicle only with appressed pubescence; stamens all subulate. - Graceful low shrub, but less showy than most other species.
bb. Flowers in corymbs or cymes.
C. Infloresence many- or several-flowered
D. Calyx-teeth shorter than tube; anthers attached to the inside of the broad filament.
(D. corymbiflora erecta, Hort.). Shrub, to 6 ft.: leaves ovate-lanceolate to lanceolate, denticulate, rough-pubescent above, grayish green below and densely covered with stellate and simple hairs, 2-4 in. long: corymbs few-flowered; flowers less than 1/2in. across; filaments with large broad teeth about as long as the nearly sessile anther. Cent. China. variety corymbiflora, Rehd. (D. corymbiflora, Lemoine). Leaves elliptic-ovate to ovate-lanceolate, acuminate, sometimes slightly cordate at the base, 2-4 in. long: corymbs many-flowered; flowers with spreading petals, 1/2in. across;
Fig. 1246. Deutzia purpurascens.
stamens about one-third as long as the petals, upright and connivent; styles shorter than stamens. June, July. Cent. China. B.M. 8255. G.C. III. 24:267. R.H. 1897, pp. 466, 467 (as D. corymbosa); 1898, p. 402. M.D.G. 1913:9 (lower picture). A.F. 14:166. Gng. 7:2. - The variety is much handsomer than the type; the flowers are comparatively small, but very numerous. Tender.
dd. Calyx-teeth lanceolate, as long or longer than the lube.
e. Anthers of the inner stamens borne on the inner side of the petaloid filaments; flowers pink or purplish outside.
(D. discolor variety purpu-rdscens, Franch.). Fig. 1246. Shrub, to 3 ft., with slender arching branches: leaves ovate to ovate-lanceolate, crenately and unequally serrate, usually rounded at the base, green and only sparingly stellate-pubescent on both sides, 1 1/2-2 1/2 in- long: corymbs 5-10-flowered; flowers with spreading petals, about 3/4in. across, white, outside purple; the inner filaments with the anther below the apex. May, June. S. W. China. B.M. 7708. G.C. III. 2:45; 26:45. G.F. 7:287 (adapted in Fig. 1246). G. 27:201. R.H. 1895:64. - Very handsome, but tender.
9. longifolia, Franch. Shrub, to 6 ft., with upright branches: leaves oblong-lanceolate to narrow-lanceolate long-acuminate, narrowed at the base, thickish, rough and somewhat rugose above, grayish white and densely tomentose below, 2-4 1/2in. long: corymbs many-flowered, loose or dense; flowers with spreading petals, more than 3/4in. across; the shorter filaments lanceolate with the anther inside near the middle. June. W. China. G.C. III. 51:409. Gn. 76, p. 243. G.M. 55:353. variety
Veitchii, Rehd. (D. Veitchii, Veitch) with somewhat larger flowers in dense many-flowered corymbs. G.C. III. 51: suppl. 19. M.D.G. 1913:17. - One of the handsomest deutzias, but has proved hardy only under protection at the Arnold Arboretum.
ee. Anthers borne at the end of the filaments.
f. Flowers usually pinkish outside (hybrids of D. purpu~ rascens).
(D. Lemoinei x D. pur-purdscens). Leaves oblong-ovate, acuminate, rounded or broadly cuneate at the base, serrulate with spreading teeth, rough above, slightly stellate-pubescent beneath, 1 1/2-3 in. long: flowers in broad corymbs, white, with spreading petals, partly imbricate in bud; filaments strongly toothed; anthers short-stalked; styles shorter than stamens; sepals triangular-ovate, about as long as calyx-tube. G.C. III. 52:45. F.S.R. 3, p. 193. A.F. 31:100, 101. M.D.G. 1907:376, fig. 5; 377, fig. 8. G.W. 13, p. 614. variety Boule Rose and variety Fleur de Pommier have the flowers pink outside.