Supplement. 



537 



DIEFFENBACHIA. According to Bentham and 

 Hooker, there are only about half-a-dozen true species of 

 this genua, all natives of tropical America. To the 

 species and garden forms described on pp. 472-5, Vol. I., 

 the following should now be added : 



D, Jenmani (Jenman's). I, long and narrow, oblong-Ianceo- 

 late, pea-green, with oblique, elongated blotches parallel with 

 the primary veins, extending from the centre nearly to the 

 margin, and mingled with smaller blotches over the surface. 

 British Guiana, 1884. (R. G. 1884, 365.) 



DIMORFHANTHUS. To the species deKcribed on 

 p. 477, Vol. I., the following variety should now be added: 



D. mandschiiricus foliis-variegatis (variegated-!eaved). 



I. green in the middle, the margins white. 1886. A handsome 

 variety. (I. H. 1886, 609.) 



DIMOBFHOTKECA. To the species described on 



pp. 477-8, Vol. I., the following should now be added: 



D, firuticosa (shrubby). fl,-heads l^in. in diameter, pedunculate ; 

 ray florets whitish above and brownish beneath. Summer. 

 {. obovate. Stems procumbent. 1887. PerenniaK 



SIOSCOBEA. According to herbarium specimens, 

 there are 130 known species of this genus, distributed over 

 the whole area of the natural order. To those described 

 on p. 478, Vol. I., the following- should now be added : 



D* crlnita (hairy). Jl. white ; racemes very immerous, pendulous, 

 solitary or several in the axils, Sin. to S^in. long, forming a 

 panicle at the ends of the branches. September. I. long- 

 petiolate; leaflets five, 2in. to Sin. long, petiolulate, elliptic- 

 lanceolate or oblanceolate, obtuse, acute or acuminate, with 

 a long, bristly macro. Natal, 1884. A slender, graceful, 

 pubescent climber, forming an elegant pot plant when trained 

 on a balloon trellis. (B. M. 6804.) 



D. bybrida (hybrid). Jl. greenish-yellow, in numerous axillary 

 clusters. I. sub-cordate, attenuated. Tuber large, flat. 1883. 

 This half-hardy twiner is supposed to he a hybrid between 

 D. Batatas and Tamus communis. (R. H, 1882, p. 379.) 



D, pyrenaica (Pyrenean). fi, solitary, rather remote, shortly 

 pedicellate ; perianth turbinate-campanulate, with oblong seg- 

 ments ; male racemes axillary, twin or ternate, simple and rarely 

 somewhat branched. July and August. I. sparse, deeply cor- 

 date-ovate, acute, mucronate. Stems one to four, slender, 

 fiexuous, branched. Underground caudex tuberous, about the 

 size of a nut. A. about Sin. Pyrejiees. Plant herbaceous, 

 glabrous. 



DIOSFYBOS. To the epecies described on p. 479, 

 Vol. I., the following species and varieties should now be 

 added ; 



D. Aurantlnm (orange). A variety of D. KaH, 



D, Berti (Bert's). A variety of D. KaH. 



D, coronaria (crowned). /., calyx spreading or slightly reflexed 

 in fruit, fr, orange-red, sub-globose, lin. in diameter. /. large, 

 coriaceous. Japan, 1885. A small, hardy tree. 



I>. eUiptica (elliptic). A variety of D. Kaki. 



D, Kaki Aurantinm (orange), fr, light orange-yellow, apple- 

 shaped, depressed; calyx very large, with large, rhomboidal, 

 jagged segments. (R. H. 1887, p. 349, f. 2.) 



D. K* Bertl (Bert's). /r. beautiful reddish-orange-yellow, 

 depressed apple-shaped, large, smooth ; basilar cavity broad and 

 deep ; summit umbilicate, with a narrow cavity. (R. H. 1887, 

 p. 349, f. 3.) 



D. K, eUiptica (elliptic). Jr. beautiful, shining orange-yellow, 

 regularly elliptical, very smooth ; basilar cavity very small ; 

 apical mucro scarcely visible. (R. H. 1887, p. 349, f. 4.) 



D. Sabnti gallica (Sahut's, French). Jr. reddish-yellow and 

 golden, covered with a silvery bloom, apple-shaped, acuminate at 

 summit; surface smooth and rounded; basilar cavity almost 

 absent ; umbilical cavity absent and replaced by a slight, charac- 

 teristic, angular elevation. (R. H. 1887, p. 349, f. 5.) 



D. Wlseneri (Wisener'H). >!., calyx lobes having a short, central 

 lobe. . Jr. egg-shaped, obscurely ribbed. L elongate-ovate, 

 shortly attenuated and rounded at apex. Japan, 1887. Hardy. 

 Probably a variety of D. KakL 



DISA. To the species described on pp. 483-4, Vol. L, 

 the following should now be added: 

 D, atropnrparea (dark-purple). /. rich purplish-lake, solitary, 



on slender peduncles 3in. to 4in, high ; dorsal sepal hooded, with 

 a very short, knob-like spur, the lateral ones elliptic-lanceolate, 

 acute ; petals auricled at base, bifid at apex ; lip with a distinct 

 stalk Jin. long, and a cordate, acuminate, wavy-margined blade, 

 having two or three teeth on each side. I, linear. Grass-like. 

 South Africa, 1885. A beautiful little plant. (B. M. 6891.) 



D- racemosa (racemose). Jl. light purple, marked white, dark 

 purple, and green ; middle sepal rhombic, the lateral ones oblong; 

 petals cuneate-triangular, serrated on the upper margin, with 



Vol. IV. 



Diaa — contimred, 



iuQexed apex ; lip rhombic-lanceolate, narrow, small ; inflorescence 

 one-sided, about six-flowered. 1887. (B. M. 7021.) SyN. 

 D. secimda. 



D. secunda (side-flowering). A synonym of D. racemosa. 



BISCANTHUS. A synonym of Cyclantlius (which 



see). 



DISF0B.I7M. To the species described on pp. 484-5, 

 Vol. I., the following should now bo added; 



D. Iieschenanltiannm (Leschenault*s). n. white, Jin. to Jin. 

 in diameter, sub-campanulate, two to five together in the upper- 

 moat axils ; segments oblong or linear-oblong. Spring. /. rather 

 rigid, lin. to 4in. long, lin. to 2!n. broad, narrowud to diNtinct 

 petioles, varying from elliptic-lanceolate to almost orbicular, 

 cuspidate, acute, acuminate, or almoyt caudate, h. 1ft. to 2ft. 

 Mountains of South India and Ceylon. (B. M. 6935.) 



DODECATHEON. To the speoies described on 

 pp. 485-6, Vol. I., the following should now be added: 



D. Meadia splondidum (splendid). Jl. deep crlmiiun, with a 

 yellow ring at the orittce of the reflexed corolla; scape four to 

 ten-flowered. Spring. 



DOLZCHODERIA TTTBirLORA. A bynonym of 

 Acliimenes tubiflora (wlu»jh s6p). 



DOODIA. The fivo specieB included in this genus are 

 confined to the islands from Ceylon eastward to Fiji, New 

 Zealand, and Australia. To those described on p. 48G, 

 Vol. I., the following varieties should now be a<lded: 



D. aspera xnnltiflda (many-cleft), fronds arched, with a dense 

 tassel at the apex ; when young, tinted pfnk. pwarf evergreen. 



D. Harryxina (Harry Veitch's). This difTers from D. caudata 

 (of which it is apparently a fonu) in being stouter, of firmer 

 texture, and larger. 188^, Garden variety. 



DOITOLASIA. One species of this genua is a native 

 of Central Europe ; the rest are North American. Flowers 



axillary or terminating the branehlets, solitary and sessile 

 or pedicellate, sometimea fascicled or umbellate ; calyx five, 

 cleft to the middle; corolla salver-shaped, the limb of five 

 imbricated lobes. Leavef^ imbricated or clustered and 

 spreading, entire. To the species described on p. 488, 

 Vol. I., the following should now bo added; 



D* laevigata (smooth).* Jl, rose-pink, pedicellate, ^in. in dia- 

 meter ; corolla tube twice as long as the calyx, the lobes very 

 broadly obovate ; involucral bnicts four to six, \\n. long ; peduncle 

 about lin. long, erect, two to five-flowered. tSpring and autumn. 

 L rosulate» ^in. to fin. long, linear or oblong-lanceolate, acute 

 or sub-acute. Alps of Oregon, 1886. Plant tufted. (B, M, 6996.) 



* DBACSNA* To the speoiea described on pp. 490-1, 



Vol. I., the following should now be added : 



D. floribnnda (abundant-floweredX JL greenish, cylindrical, 

 above Jin. long ; panicle drooping, shortly pedunculate, 3ft. to 

 4(t. long, made up of fifteen to twenty drooping raceui&b 1ft. or 

 more long. I. fifty to sixty, crowded in a dense rosette, lorate, 

 acuminate, 3ft. to 4ft. long, Sin. to ^'\n. broad. Trunk 6ft. to 

 8ft. high. Native country unknown. (B. M. 6447.) 



D. fragrans varlegata (variegated). I. recurved, deep green, 

 with a broad, central, striped variegation of yellow and pale 

 yellowish-green. 1887. Syn. X>. Liiuicnu 



D. Undeni (Linden's). A synonym of D. Jragrans variegatck. 



D* Hassan geana (Massange's). I. broftdl^ lanceolate, acuminate, 

 dark green, with a median, whitinh Btripe. 1883. A variety of 

 D. fraijrans, closely reaembling D. /. varieyaia, (B. II. 1881, 16.) 



D, sepiaria (hedge -loving). Jl. pure white, in large paniclefl. 

 fr. yellow, persistent for a long time. I. upright, Bmall, dark 

 green, tufted- Fiji, 1887- An ornamental perennial. 



DSACOCISFHAiLnM, To the Bpeciea described on 

 p. 491, Yol. I., the following phould now be added: 



D, Imberbc (beardless). Jt., corolla lilac blue. lin. long, the lips 

 nearly equal ; bracts cuneate, cut, glabrous. I., radical ones lank* 

 petiolate, cauline onea few, shortly petiolate, all reniform, deeply 

 crenate. Florlferona branches erect A, 6In. Siberia, 1383. 

 (E. G. IC^, f. 4-5.) 



DKACONTZUM. Abont half-a-dozeu epociea, all 



tropical American, are here inclnded. To those described 

 on pp. 491-2, Vol. L, the following should now be added: 



D. fcecandnm (fertUe). JL, spathe dull brown outside, dark 

 vinous-purple within, 5in. high, erect, narrowly cylindric-oblon|f ; 

 spadix bluish-brown, liin. high, snb-sesrfle, erect, cylindric, 

 obtuse. March. L solitary, produced after the flower, 4ft to 5ft 

 In diameter, horizontal, tripartite, each aegment bearing several 

 pairs of drooping leafleU ; petiole 6ft high. Tubers surrounded 

 by a profusion of acute bulbils, riaiu;; above the ground, British 

 Guiana, 1830. (B. M. 6808.) 



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