1016 



DIOSPYROS 



DIPHYLLEIA 



mens 12-13, glabrous: fr. ovoid, sericeous or glabrate, 

 1/4-1 M in- long, edible. Mauritius. Yields the ebony 

 of Mauritius. Cult, in S. Calif. 



D. armata, Hemsl. Spiny tree, to 20 ft.: Ivs. persistent, oval- 

 oblong, obtuse, 1-2 in. long: staminate fls. in short panicles, creamy 

 white, fragrant: fr. usually solitary, %in. across. Cent. China. 

 Tender. D. Ebendster, Retz. The "guayabota" and "zapote 

 negro," from Mex. and W. Indies, has been catalogued in S. Calif. 

 It is a tall tree, with very sweet frs. the size of an orange, green out- 

 side and almost black inside: Ivs. elliptic or oblong, usually obtuse, 

 3-12 in. long: fls. white, fragrant. D. Ebenum, Koenig. Tree, 

 to 50 ft.: Ivs. elliptic-oblong, bluntly acuminate, glabrous: fls. 

 white, staminate, in short racemes. E. Indies, Ceylon. For cult, 

 in hothouses or tropical climates. This species is said to yield the 

 best ebony. D. Morrisiana, Hance. Evergreen shrub or small 

 tree, glabrous: Ivs. oval, obtusely acuminate, 2-3 J^ in. long: fls. 

 whitish, drooping, on hairy stalks: fr. yellow, subglobose, J^-%m- 

 across. Hongkong, Formosa. The edible fr. ripens in Dec. D. 

 iitilis, Hemsl. Evergreen large tree: branchlets silky-pubescent: 

 Ivs. oblong, short-petioled, glabrous above, whitish and silky- 

 pubescent beneath, 5-8 in. long: fr. depressed-globose, pubescent, 

 nearly 2 in. across. Formosa. The edible fr. is called Mao-shih. 



ALFRED REHDER. 



DIOSTEA (probably two stones or seeds). Ver- 

 benaceae. Once referred to Baillonia, but now kept 

 distinct; closely allied to Lippia, but differing widely 

 in habit, in the slender green branches, in the branchlets 

 having very long internodes and being cylindric and 

 hollow. D. juncea, Miers, of the Andes of Chile and 

 Argentina, is a bush or small tree, with the long 

 branches constricted when dry: Ivs. opposite, 1 in. or 

 less long, sessile, oblong or ovate-oblong, obtuse, 

 crenate, rather fleshy: fls. small, pale lilac, in peduncled 

 axillary or terminal spikes; corolla tubular, inflated 

 above the middle, hairy inside, with 5 very short 

 rounded spreading lobes; stamens 4, didynamous. 

 B.M. 7695. 



DIOTIS (two-eared, denoting the structure). Com- 

 pdsitse. One cottony perennial on sea sands of Eu., 

 sometimes planted in rock-gardens and for edgings. 

 D. candidissima, Desf. (D. maritima, Smith). COT- 

 TON-WEED. Usually less than 1 ft. high, has hard sts. 

 almost woody at base, arising from a creeping root- 

 stock : Ivs. alternate, oblong, entire or slightly toothed, 

 about J^in. long: fl.-heads nearly globular, J^in. across, 

 in dense terminal clusters, in Aug. and Sept. It is 

 readily prop, by seeds or cuttings. Diotis is closely 

 allied to Achillea, being distinguished by the florets 

 being all tubular and having 2 ears at the base of the 

 corolla which persist and inclose the achene. 



DIPCADI (meaning uncertain). Including Tricharis 

 and Uropetalum. Liliacese. Tender bulbous scapose 

 plants of minor importance, allied to Galtonia. 



Leaves radical, thickish, narrowly linear: scape 

 simple and leafless, bearing loose racemes of odd- 

 colored fls.; perianth with a cylindrical tube, the lobes 

 mostly equaling or exceeding the tube, the 3 exterior 

 ones spreading or flaring and the 3 interior usually 

 shorter and erect; stamens 6, on the throat of the peri- 

 anth, the anthers linear and attached by the back; 

 ovary sessile, ovoid or oblong, becoming a 3-sided 

 dehiscent caps.: bulb tunicated. About 50 species in 

 S. Eu. ; Trop. and S. Afr. and India. During the winter, 

 their resting time, the bulbs should be kept dry. A 

 compost of light, sandy loam and leaf-mold has been 

 recommended. Many species have been described in 

 recent years from Trop. and S. Afr., and some of them 

 may be expected to appear in the trade, and in lists of 

 novelties. 



A. All perianth-segms. equally long. (Tricharis.) 

 serdtinum, Medikus. Lvs. 5-6, fleshy-herbaceous, gla- 

 brous, narrowly linear, 6-12 in. long, 2-3 lines wide 

 near the base, channeled on the face: scape 4-12 in. 

 long; raceme loose, 4-12-fld.; bracts lanceolate, 4-6 

 lines long, longer than the pedicels; perianth greenish 

 brown, 5-6 lines long; ovary sessile or subsessile. S. 

 Eu., N. Afr. B.M. 859 (as Scilla serotina). 



AA. Outer perianth-segms. longer than the inner and 

 tailed. ( Uropetalum,) 



filament6sum, Medikus (D. mride, Moench). Lvs. 5-6, 

 fleshy-herbaceous, narrowly linear, glabrous, 1 ft. long, 

 1K-3 lines wide near the base: scape 1-2 ft. high; 

 raceme loose, 6-15-fld.; bracts linear-acuminate, 4-6 

 lines long; perianth green, 12-15 lines long, outer 

 segms. 4-6 lines longer than the inner: caps, sessile or 

 nearly so. S. Afr. WILHELM MILLER. 



L. H. B.f 



DIPELTA (Greek dis, twice, and pelte, shield; two 

 of the floral bracts are shield-like). Caprifoliacese. 

 Ornamental deciduous shrubs, grown for their hand- 

 some pinkish or purple flowers. 



Leaves opposite, short-petioled, entire or denticulate, 

 without stipules : fls. solitary or in leafy few-fld. racemes, 

 with 4 unequal conspicuous bracts at the base; calyx- 

 lobes linear or lanceolate, 5; corolla tubular-campanu- 

 late, 2-lipped; stamens 4, inclosed; style slender, 

 shorter than corolla; ovary inferior, elongated, 4-celled, 

 2 of the cells with 1 fertile ovule each and 2 cells with 

 several sterile ovules: fr. a caps, inclosed by the en- 

 larged, usually shield-like, bracts. Four species in 

 Cent, and W. Asia. 



Dipeltas resemble diervillas in habit, with hand- 

 some pinkish or purple flowers in clusters along last 

 year's branches; the flowers in shape are like those of a 

 large-flowered abelia. D. floribunda has proved hardy 

 at the Arnold Arboretum, while D. ventricosa seems to 

 be somewhat tenderer. They are apparently not partic- 

 ular as to the soil. Propagation is by seeds sown in 

 spring and probably, like Abelia and Diervilla, by 

 greenwood and hardwood cuttings. 



floribunda, Maxim. Shrub, to 15 ft.: Ivs. ovate to 

 lanceolate, acute or acuminate, rounded or narrowed at 

 the base, entire, puberulous at first, soon glabrous, 

 2-4 in. long: fls. 1-6, on slender nodding pedicels, 

 tubular-campanulate, pale rose, lower lip with orange 

 marks, IJ^in. long; ovary inclosed by the 2 upper large 

 shield-like bracts persisting on the fr. and %-l in. 

 across. May. Cent. China. B.M. 8310. G.C. III. 42:3. 

 M.D.G. 1912:27. 



ventricdsa, Hemsl. Shrub, to 18 ft.: Ivs. ovate- 

 lanceolate to lanceolate, long - acuminate, usually 

 rounded at the base, remotely glandular-denticulate, 

 sparingly hairy above and villous along the veins 

 beneath, 2-6 in. long: fls. 1-4 on drooping slender 

 pedicels, campanulate, ventricose and scarcely tubular 

 at the base, outside purple, whitish inside and marked 

 with orange, 1J4 m - long; ovary hidden by 2 large 

 unequal auriculate bracts on the fr. about %in. across. 

 May, June. W.China. B.M. 8294. G.C. III. 44:101. 



D. yunnan&nsis, Franch. Allied to D. ventricosa. Lvs. entire: 

 corolla distinctly tubular at the base. W. China. R.H. 1891, p. 

 246. Not yet intro. D. elegans, Batal, is another handsome species 



ALFRED REHDER. 



DIPHYLLEIA (Greek, double leaf). Berberiddce<e. 

 UMBRELLA-LEAF. An interesting hardy perennial herb, 

 sometimes transferred to the wild-garden. 



Plant with thick creeping jointed knotty rootstocks, 

 sending up a huge peltate cut-lobed umbrella-like 

 radical If. on a stout stalk, and a flowering st. bearing 

 2 similar (but smaller and more 2-cleft) alternate Ivs., 

 which are peltate near one margin, and a terminal 

 cyme of white fls.: sepals 6, fugacious; petals and 

 stamens 6; ovules 5 or 6: berries globose, few-seeded. 

 This is one of the genera having only 2 species, one of 

 which is found in N. E. N. Amer., the other in E. Asia 

 or Japan, of which there are two others in this family. 



cymdsa, Michx. Root-lvs. 1-2 ft. across, 2-cleft, each 

 division 5-7-lobed; lobes toothed: st. 1-4 ft. tall: 

 berries blue. May. Wet or springy places in mountains 

 from Va. to Ga. B.M. 1666. Grows readily in dry soil 

 under cult, but is dwarf. 



