Dendrobium 



( 287 ) 



Dendrobium 



Besting Period. When growth has finished for 

 tin: .-rasun a condition indicated by the non- 

 production of new leaves at the apex nearly all 

 Dendrobiuras should Vie gradually moved from a 

 high temperature to an intermediate (or even cooler) 

 one, where, in a drier atmosphere, and with a 

 reduction of the water supply, the growths will 

 ripen and plump up. The leaves will fall from the 

 deciduous species, but evergreen species ought not 

 to receive such extreme treatment, either in tem- 

 perature or lack of moisture. Until the flower 

 buds are prominent continue the resting condi- 

 tions, only giving water when signs of shrivelling 

 are apparent. A few species, like 1). I'halamopsis, 

 that flower soon after the completion of growth, 

 are best removed to a Cattleya house, never allow- 

 ing the compost to become quite dry. 



Insect Pests. Tlirips and red spider will atfack 

 Dendrobiuins when the atmospheric conditions are 

 favourable, but as a rule these are unfavourable, 

 li is only in ill-kept collections that scale or mealy 

 bug secures a footing, but green fly will often 

 appear at the growing tips. Sponging with an 

 approved insecticide will remove these pests. 

 There appear to be two distinct beetles that 

 infest Dendrobiums, causing a large amount of 

 damage by boring into and nut of the growths or 

 pseudo-bulbs. Xyleburus perforans and Diaxenes 

 Dendrobii are their names, but as botli have 

 similar habits they demand similar treatment. 

 The IVndrobes from New Ciiiineaand neighbouring 

 islands are most, subject to attack, conseqiientlv 

 importations ought to be carefully examined and 

 have all bored and withered growths removed and 

 burned. Moreover, it is necessary to keep the 

 new stoek under careful observation, and remove 

 any growths that show marks of infestation by 

 withering or by a black or brown discoloration; 

 if such growths are found to be hollow when 

 si|iie"zed it is an additional indication of infesta- 

 tion. It is the grab that does the boring, and it 

 spins the cocoon from which the beetle emerges. 

 The beetle is e'piallv dangerous, as it feeds on leaf 

 and growth. Besides burning all infested portions 

 of the plant a further remedy is to hunt for the 

 beetles at night, with a lantern ; they are about 

 i" lung, brownish grey, lined with white or 

 yellow, 



Principal Species and Varieties : 



aggregatnm ma jus, 1', 



Ap., yel. 

 aiiiirmini, I.'.', .Te., wh. 



yel. (.v////.mesoehlorum). 

 aureum, IV, Jan., Feb., 



yd., red, fragrant (*i/t/. 



heterooarpum). 

 Bcnsona:, 2', My., Je., 



wh., criin., pur., or. 

 bigibbum, H', .Sep., Oct., 



magenta pur. 

 btymeriannm, li', Feb., 



Mch., deepyelJ 

 clirys.-iMtlmm, 0", Sep., 



or., yd., maroon, 

 orirysutoxuin, 1', Mch., 



Ap., yel., or. 

 rrassinode, 2', Jan., Mch., 



wli., pur., or. 

 crct.iccuiri, 1', My., Je., 



civainy wli. 

 didhousieanum (/ pid- 



chclhim). 

 dcnsiflortiin, li', Mch., 



My., or. yel. " 



devonianum, 3', My., Je., 

 wh., pur., or. 



Falconeri, 4', My.. Jc., 



wh. , shaded ro. . pur. , or. 

 Farmer!, I. 1 ,', My., Je., 



yel. 

 nmbtratnm oculatum, 4', 



My., or., yel., maroon 



(/. Paxtonii, 1'it.rton). 

 finillayanum. 1.1', Feb., 



Ap., pule HI., yel. 

 formosum gigauteuin, li ', 



My., wh., yel. (nee p. 



286). 

 Hildebrandii, 2', Mch., 



My., yel., or. 

 infimdibulum,2', Je., wh., 



or. 

 Johnsomr, 8", Jan.. Mch. , 



wli., lip marked pur. 



(*//;/. Macfarlanei). 

 linn wiiinum , 1 .1', rosy pur. , 



wh.. pur. 

 lituifliirum, 2', Ap., My., 



rich pur., wh. 



lutecium, IV, Mch., Ap., 

 rosy yel. 



MacCartlme, H, Aug. ,ro., 

 wh., pur. 



macrophyllum Veitchii, 

 li', yel., wh., pur. 



nohile, 2', Jan., Mch., ro., 

 pur., wh., dark pur. 

 A few choice vars. of 

 this widely cultivated 

 and variable species are 

 halliauum, cooksoni- 

 amun, Haekbridgc var., 

 nobilius, and sandcrian- 

 um. 



Phalirnopsis, 2', Oct., 

 Xov., inauve, rosy pur. 

 There are several 

 beautiful forms of this 

 popular species, nota- 

 bly album, Applcton's 

 var., hololeucum 

 (wholly white), schrii- 

 dcriauum, and stattcri- 

 auum. 



ricrardii, 2', A]i., whitish. 



}:viniulinum, 1^', Feb., 

 Meh. , primrose, ro.,pur. 



Principal Hybrids : 

 Ainsworthii (aureum X 

 nobile), Feb., Mch. 



leechiammi (aureum X 

 nohile), Feb., Mch. 



spleiulidisshmim (au- 

 reum X nobile), Feb., 

 Mch. 



splendidifsimum gran- 

 dirlorum (aureum X 

 uobile), Feb., Mch. 



Asj-asia (aureum X ward- 



ianum), Mch. 

 <'a>*iope (monoliforme 



X nobile albiflorum), 



Feb., Mch. 

 chlorostele (linawianum 



X wardiaimm), Jan., 



Feb. 

 chrysodiscum(Aiusworthii 



X nndlayaiiuni), Feb.i 

 Clio (Ainsworthii splcn- 



didissimum graudi- 



florum X wardiaimm), 



Mch. 

 crassinodo - wardianum, 



Mch. 

 curtisiauum (Cassioj)e X 



aureum), My. 

 dulce (aureum X lina- 



wiauurn), Mch. 



(*//. nobile pallidi- 



florum, Jluiikrr). 

 pulchellum, 4'. Ap., My., 



pale yel., shaded ro., 



blotched maroon (/. 



dalhousieammi). 

 signatum, H', Mch., wh., 



yel., br. 

 speciosum, H',Feb.,Mch., 



buff. 

 Hillii, creamy wh. 



(nee p. 288). 

 spectabile, IV, Dec., liuff, 



pur., crim. 

 6up;rbiens, 2i', aut., 



crim., pur. 

 superbum, 3', Ap., M-h., 



rich pur. (xyii. macran- 



thum). Three distinct 



vars. are amiMiiimi, 



scentless; Burkei. wli., 



]iiir. ; and Dearei, pure 



wh. 

 thyrsiflorum, 2',Ap.,My., 



wh., jel. (tec p. 2K(i)." 

 wardiaimm, 3', Feb., 



Mch., wh., deep pur., 



or., maroon. 



endocharis (monolifonne 



X aureum), Mch. 

 euosmum (emlocharis X 



nobile intermedium) , 



Mch. 

 Euryalus (Aiuswortliii X 



nobile), Mch. 

 melanodiscum (findlay- 



animi X Ainsworthii), 



Jan., Mch. 

 Melpomene (signatum 



X Ainsworthii sjilcn- 



uidissiuium grandi- 



florum), Mch. 

 micans (wardionum X 



lituiflorum Freemanii\ 



Mch. 

 Niobe (tortile X uchile), 



Ap. 

 Rolfte (nohile X primu- 



linum), Mch. 

 schiieidcrianujn (filldlay- 



auuin X aureum), Mch. 

 statterianuin (Bensoua: 



X crystalliuum), Aug. 

 Venus (nobilc X Fal- 



coueri), Ap. 

 \\"igania' (.siguatum X 



uobile), Ap. 

 wiganiaimm (Hilde- 



hrandii X nobile), Feb. 



Other Species and Hybrids : 



aduncum, 2', spr., pk. 

 albosauguiiieum, if, Ap., 



wh., red. 

 amethystoglossum, 3', 



Jan., Feb., wh., pur. 

 Aphrodite, 1', Jy., Aug., 



cream, yel. 

 aqueum, 1', Nov., gni., 



wh. (ttt/H. album), 

 atro^olaceum, spr., wh., 



pur. (fee p. 284). 

 barbatulum, \\\ Mch., 



wh., red. 

 Boxallii, ', Feb., Mch., 



wli.. pur., yel. 

 Bryan (lutcolum X wardi- 

 aimm), Mch. 



Calceolaria, 2', Je., or., 



pk. (XI/H. mosclmtum). 

 cambridgeanum (see oclirc- 



itum). 

 caualiculatum, 1', Feb., 



yel., pur. 



capillipes, 4". Ap., yel. 

 cariniferum, 9", Ap.,wh., 



or., red. 

 chlorops. 1'.', Jan., Feb., 



ci rainy wh. 

 Ccelogyiie, (>", Oct., Nov., 



buff, pur , or. 

 Cordelia (eiiosMiiiin leu- 



I'opterum X annum), 



Mcli. 

 crc]iidatuui, 1 J', Ap., wh., 



lik., or. 



