45G 



JOURNAL OF THE ROYAL HORTTCULTTTRAL SOCTRTY. 



white single flowers, does not appear to be quite hardy, but, from the 

 general description, might be well worthy of trial on some of the 

 sheltered positions in Cornwall and elsewhere on our western coasts. 

 It flowers in November, and, judging by the illustration, is then a very 

 beautiful object. It produces large tubers, and the treatment is much 

 the same as for the ordinary dahlia, being planted, after a complete rest 

 in deep pans in April in rich soil, and put out when frosts are over. 

 Does not lend itself to previous forcing. — C. T. D. 



Dahlias, Source, Culture, and Diseases of (conclusion). By i 



K. Schechner [Oester. Gart. Zeit. vol. v. pt. 12, pp. 465-471). — Improved 

 varieties of the dahlia have been obtained by careful crossings, judicious 

 selection, and good cultivation. Dahlias are increased by cuttings from 

 sprouted tubers. 



Dahlia seed is sown in a hot bed about the end of March. The 

 seedlings are hardened off and planted out towards the middle of May. 

 The seed may be kept for ten years before planting. 



In summer liquid manure is beneficial. In a damp situation, basic ■ 

 slag should be given. If the plants make many side branches, these 

 should be removed in June or July. When the dahlias are cut down by [ 

 ,frost, the stem is removed about 8 inches from the ground, the tubers I 

 forked up, dried and placed in a building where they are protected from ; 

 frost. I 



Tubers attacked by sclerosis must be destroyed. Earwigs and two j 

 kinds of caterpillars, Mamestra oleracea and M. persicariae, are the j 

 chief enemies of the dahlia. Dahlia viridiflom is a good pot plant. 



S. E. W. j 



Deinanthe caerulea {Bot. Mag. tab. 8373). China. Family j 

 Saxifragaceae ; tribe, Hydrayigeae. Herb, perennial, 1-1^ foot high, j 

 Stem, solitary; leaves 4, near top of the stem, wide, elliptic; panicle,] 

 terminal; peduncle, 2-6 inches long; fertile; flowers 1| inches across, 

 lavender. — G. H. 



Dendrobium Coelog-yne. By E. Miethe {Orchis, vol. iv. pt. 4,1 



pp. 122-123 ; 1 plate). — This orchid flowers in autumn. The sepals j 

 and petals are dark, yellowish-green, with reddish-brown spots; the! 

 labellum is dark purple, and there is an orange-coloured spot in the 

 'throat.— >S'. E. W. 



Dendrobium Dartoisianum (Bot. Mag. tab. 8352).— Indo- 

 china. Family Orchidaceae ; tribe, Epidendreae. Herb, 1^-2^ feet 

 long; leaves 3^-4 inches long; racemes short; flowers, show^y, pale 

 yellow wuth purple-tipped sepals, and petals wavy ; and a purple-streaked 

 lip-base. — G. H, 



Dendrobium muricatum var. munificum {Bot. Mag. tab. 

 8371). — New Caledonia. Nat. ord. Orchidaceae ; tribe, Epidendreae. 

 Epiphyte. Leaves, 3-9 inches long; flowers, 1^ inch across; sepals 

 fjreenish, spotted with purple; petals whitish-green spotted at end; lip, 

 purple base, yellow apex. — G. H. 



