AN ENCYCLOPEDIA OF HORTICULTURE. 



477 



D. florlbunda (bundle-flowered). fl. yellow, crowded, axillary, 

 twin. April. I crowded, subulate, mucronulate, scabrous from 

 tubercles. A. 2ft. to 6ft. 1794. STN. D. rvdit. (B. M. 1545, 

 under the name of D. ericifoUa.) 



D. glycinlfolia (Glycine-leaved). 

 angustifoUum. 



A synonym of Chorizema 



D. hlsplda (hairy).* A disposed in terminal heads upon numerous 

 side shoots ; corolla deep purple-red ; standard and wings red. 

 May. I long, obtuse or scarcely-pointed, not twisted, and without 

 any prominent keeL A. 3ft to 6ft. STN. D. feabra. (L.J.F.296.) 

 D. jnnlperina (Juniper-leaved). JL, corolla orange-coloured, 

 with the vexillum and wings streaked in their lower part with 

 red ; heads of flowers terminal ; pedicels bibracteate. March. 

 1. nearly filiform, smooth, ending in a pungent point, spreading, 

 straight, serrated, h. 1ft to 3ft 1818. (LTB. cHoL) 

 D. rndls (rustic). A synonym of D. Jloribunda. 

 D. scabra (rough). A synonym of D. hitpida. 



DIMIDIATE. Divided into two unequal parts. 

 DIMORPHANTHUS (from dimorphos, two-formed ; 

 in allusion to there being two kinds of flowers, perfect and 

 sterile). OBD. Araliacece. This genus is now included 

 under Aralia, and the species described below is in reality 

 merely a variety of A. chinensis. A very handsome hardy 

 shrub, of erect habit, with very large, much-divided, spiny 

 leaves. This remarkably fine foliage plant requires a 

 sheltered, but sunny, spot, where it will fully develop its 

 beauty. For sub-tropical gardening it is very useful. It 

 requires similar cultivation to A' > y-' 1 * n - (which see). 



FIG. 668. DIMORPHANTHUS MANDSCHURICUS, showing Flowering 

 Branch, detached portion of Inflorescence, and single Leaflet 



D. mandschuricus (Manchurian).* I from 3ft to 5ft long, and 

 nearly as much in width, bipinnate, very hairy and prickly. 

 h. 6ft to 10ft. Manchuria, 1866. Deciduous. See fig. 66. 



DILLWTNIA (named in honour of Lewis Weston 

 Dillwyn, a botanist whose labours were more especially 

 directed to the British Conferva, ; born 1778, died 1855) 

 OED. Legurmnosas. A genus of elegant greenhouse ever- 

 green Heath-like shrubs. Flowers yeUow or orange-red 

 few together, in axillary or terminal racemes or corymbs 

 rarely solitary ; petals clawed. Leaves alternate or scat- 

 tered, simple, narrow-linear, or terete, channelled above- 

 stipules wanting. There are about half-a-score species 

 all natives of Australia. For culture, see Choriema. 

 D. eridfolia (Heath-leaved).* /f, yellow, in very short racemes 

 or clusters, sometimes several together, almost sessile in a 

 terminal leafy corymb ; petals deciduous ; calyx glabrous May 

 f' n - Um j r U ^ > ra""* Bender, usually iin. to iin. long, but sometimes 

 twisted when dry, obtuse, with a short, recurved or straight 



a ssssfiff & Assa-ssj? oi 

 jssssKfejssssF *5a .% , 



DIMORPHISM. A state in which two fo 

 flower or leaf are produced by the same species. 



FIG. 669. DION*A MDSCrPOLA (see page 478). 



DIMORPHOTHECA (from dimorphot, two-formed, 

 and theca, a receptacle ; disk-florets of two forma). ORD. 

 Composite. A genus of about twenty species of smooth, 

 hairy, or glandular annual herbs or shrubby perennials, 

 natives of South Africa. Flower-heads long-stalked ; disk 

 orange-yellow or purplish; ray the same colours or white. 

 Leaves radical or alternate, entire, toothed, or cut, often 

 narrow. These half-hardy plants grow freely in well- 

 drained loam; they are suitable for open air cultivation 

 during summer, and for cool greenhouse in winter. The 

 annual sorts should be sown in heat, under glass, in 

 spring, and planted out at the end of May. The peren- 

 nials are readily grown from cuttings. 

 D. Barberias (Mrs. Barber's). A purple-flowered greenhouse 



plant from Caffraria, 1862. Perennial. SYN. D. lOaeina. (B. M. 



5337.) 



D. chrysanthemifolia (Chrysanthemum - leaved). A., head* 

 ' ig aboo 



jut eleven in the forenoon, and closing 



yellow, large, openln 



again by three or four in the afternoon. April to July. (. ob- 

 ovate, Sub-lyrate, ronghish. Stem suffruticose, erect *. 2ft 

 1790. STN. Calendula chrysanthemifoiia (under which name it 

 is figured in B. M. 2218). 



D. cnneata (wedge-leaved). fi.-head* (both disk and ray) orange. 

 t cuneate or lanceolate, coarsely toothed, nearly glabrous, gland- 

 dotted, h. 2ft to 3ft A beautiful much-branched greenhouse 

 shrub, STN. Aretotii glu&WM. (B. 1L 1343.) 



D eraminifoli* (grassy-leaved). JL-headt 2iin. across, hand 



