DIEFFENBACH1A 



DIERVILLA 



483 



late -maculata, Lind. & Andre" (D. Hliixtrix. Hort.). 

 Lvs. glaucous-green, profusely white-barred and white- 

 spotted. Brazil. I. H. 23: 2:54. 



Jenmani, Veitch. Lvs. rich, bright, glossy green, re- 

 lieved by a milk-white band at every lateral nerve, and 

 by a few white spots interspersed between the bands. 

 Guiana. 



magnifica, Lind. & Rod. Lvs. ovate-acuminate, large, 

 dark green, blotched and spotted with white along the 

 veins. Venezuela. I. H. 30: 482. S.H.2, p. 383. 



marmorea, Hort. See Parlatorei. 



Parlatdrei, Lind. & Andre", var. marmdrea, Andre 

 (D. me mo rin and tnormra and Corsii, Hort.). Lvs. 

 long-oblong, acuminate, the midrib white and the blades 

 blotched white, the green deep and lustrous. Colombia. 

 I.H. 24: 291. Engler refers this plant to the genus 

 Philodendron. * 



Regina, Bull. Lvs. oblong-elliptical, greenish white, 

 mottled and blotched with alternate light and green 

 tints. S. Amer. 



K6x, Hort. Compact: Ivs. oblong-lanceolate, the two 

 sides not equal, deep gr*?en, but the white angular 

 blotches and midrib occupying more space than the 

 green. S. Amer. 



splgndens, Bull. Stem faintly mottled with dark and 

 light green: Ivs. have a thick ivory white midrib, and 

 the ground color is of a deep, rich, velvety bottle green, 

 with a resplendent, lustrous surface, freely marked 

 with whitish striate blotches. Colombia. 



triumphans, Bull. Lvs. dark green, ovate-lanceolate 

 and acuminate, a ft. long, irregularly marked with angu- 

 lar yellowish blotches. Colombia. 



JABED G. SMITH and G. W. OLIVER. 



DltLYTRA. SeeDicentra. 



DIERVfLLA (after Dierville, a French surgeon, who 

 took D. Lonicera to Europe early in the eighteenth 

 century). Capri folidcece. WEIGELA. Shrubs of spread- 

 ing habit, with more or less arching branches, and, es- 

 pecially the Asiatic species, with very showy fls. from 

 pure white to dark crimson, appearing late in spring. 

 Lvs. opposite, petioled, serrate : fls. in 1 to several-fld. 

 axillary cymes, often panicled at the end of the branches, 

 yellowish white, pink or crimson, epigynous ; calyx 5- 

 parted; corolla tubular or campanulate, 5-lobed, some- 

 times slightly 2-lipped ; stamens 5 : fr. a slender, 2- 

 ,celled capsule, with numerous minute seeds. About 10 

 species in E. Asia and N. Amer. They thrive in any 

 common humid garden soil, the Amer. species pre- 

 ferring moist and partly shaded positions. The Asiatic 

 species require protection north during the winter, or 

 sheltered positions. Prop, readily by greenwood cut- 

 tings or hardwood cuttings ; the Amer. species usually by 

 suckers and by seeds sown in spring. 



Index of species (some of the names in italics were 

 described under Weigela): amabilis, 3; arborea, 4; 

 arborescens, 6 ; Canadensis, 1 ; Coraeensis, 4 ; flori- 

 bunda, 6 ; florida, 3 ; grandiflora, 4 ; Groenewegeni, 7 ; 

 hortensis, 5; hybrida, 7; Japonica, 5; Lonicera,!; Mid- 

 dendorflana, 8 ; multiflora, 6; rosea,3; sessilifolia, 2 ; 

 Steltzneri, 7; trifida, 1; Van Houttei, 7. 



A. Fls. yellow, slightly 2-lipped, small, %-%in. long. 

 I iervilla proper. 



1. Lonicera, Mill. (D. trifida, Mceuch. D. Canadensis, 

 Willd.). Shrub, to 3 ft.: branchlets nearly terete, 

 glabrous: Ivs. distinctly petioled, ovate-oblong, acumi- 

 nate, serrate, nearly glabrous, finely ciliate, 3-4 in. long: 

 cymes usually 3-fld.; limb nearly equal to the tube. 

 June, July. Newfoundland to Saskatschewan, south to 

 Ky. and N. C. B.M. 1796. D. 44. 



2. sessilifdlia, Buckl. Shrub, to 5 ft. : branchlets quad- 

 rangular : Ivs. nearly sessile, ovate-lanceolate, serrate, 

 nearly glabrous, of firmer texture, 3-6 in. long: cymes 

 3-7-fld., often crowded into dense, terminal panicles: 

 limb shorter than the tube. June, July. Carol, and Tenn. 

 G.C. III. 22: 14. -Hardy in Canada. 



AA. Fls. showy, while, pink or crimson, rarely 



B. Anthers not connected w ith each other. (Weigela.) 



c. Calyx lobes lanceolate, connate at the base, often to 



the middle: stigma 2-lobed: seeds wingless. 



3. !16rida, Sieb. & Zucc. ( Weigela rdsea, Lindl. W. 

 mini hi Us, Hort.). Shrub, to 6 ft.: branchlets with 2: 

 hairy stripes : Ivs. short-petioled, elliptic or ovate-ob- 

 long, serrate, glabrous above except at the midrib, to- 

 mentose on the veins beneath: calyx nearly glabrous: 

 ovary slightly hairy: fls. 1-3, pale or deep rose, l%in. 

 long; corolla broadly funnel-shaped, abruptly narrowed 

 below the middle. May, June. N. China. B.M. 4396. 

 F.S. 3:211. B.H. l:577.-This is one of the most culti- 

 vated species, very free-flowering and rather hardy. 

 Var. alba. Fls. white, changing to light pink. R.H. 

 1861:331. Var. Candida. Fls. pure white. Var. Isoline. 

 Fls. white or slightly pink outside, with yellowish spot 

 in throat. F.S. 14:1445. Var. Kosteriana variegata. 

 Dwarf: Ivs. bordered yellow : fls. deep rose. Var. 8i6- 

 boldi alba-marginata. Lvs. bordered white : fls. rose. 

 Var. nana variegata. Dwarf. Lvs. variegated with 

 white: fls. nearly white. 



cc. Calyx lobes linear, divided to the base: seeds 

 winged : stigma capitate. 

 D. Plant nearly glabrous. 



4. grandifldra, Sieb. & Zucc. (D. Coraeensis, DC. 

 D. amabilis, Carr.). Shrub, 5-10 ft. : Ivs. rather large, 

 obovate or elliptic, abruptly acuminate, crenately ser- 

 rate, sparingly hairy on the veins beneath and on the 

 petioles : fls. in 1-3-fld., peduncled cymes ; corolla 

 broadly funnel form, abruptly narrowed below the mid- 

 dle, changing from whitish or pale pink to carmine.. 

 May, June. Jap. S.Z. 31. F.S. 8:855. Vigorously grow- 

 ing shrub, with large Ivs. and fls., but less free-flower- 

 ing, and the type not common in cultivation. Var.. 

 arborea, Hort. ( W. arbbrea grandifldra, Hort.). Fls. 

 yellowish white, changing to pale rose ; of vigorous. 

 growth. 



DD. Plant more or less pubescent : corolla finely 

 pubescent outside. 



5. Japonica, DC. Shrub, to 6 ft. : Ivs. oblong-obovate 

 or elliptic, acuminate-serrate, sparingly pubescent. 



above, tomentose beneath: fls. usually in 3-fld., shori- 

 peduncled cymes, often crowded at the end of short 

 branchlets; corolla broadly funnel form, narrowed below 

 the middle, whitish at first, changing to carmine; style 



