464 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Cattleya gigas. By R. Gaveau [Orchis, vol. vi. pt. vi. pp. 103- 



104). — Cattleya gigas is a shy bloomer. To induce it to flower give 

 plenty of light and air, and keep the plants rather dry. Early growth 

 must not be encouraged. — S. E. W. 



Cattleya nooilior. By O. N. Witt (Orchis, vol. vii. pt. iv. 

 PP- 5 I_ 55 J 1 plate). — C. nobilior flowers much more freely than 

 C. Walkeriana : the bulbs generally bear two leaves. The flowers 

 have a uniform deep violet colour, and are borne on a long stem. If 

 the Orchid is kept moderately dry at the time when it is about to 

 produce bulbs, it develops a short flower stem on the leaved bulbs, 

 and is identical with C. dolosa. The latter is not a distinct variety. 



5. E. W. 



Cauliflower and Cabbage Cultivation. By A. J. Pinn (Agr. 

 Gaz. N.S.W., pp. 1059-1075 ; 9 figs.). — The ground in which cab- 

 bages and cauliflowers are grown requires frequent supplies of 

 farmyard manure. In addition, 3 cwt. to the acre of the mixture of 

 bone dust (9 cwt.) and potassium sulphate (1 cwt.) is applied when 

 sowing or planting out, and a dressing of ammonium sulphate J cwt., 

 potassium sulphate \ cwt., and § cwt. superphosphate is given before 

 the heads begin to form. The black rot of cabbage (Pseudomonas 

 campestris) is propagated in the seed. It is advisable to dip the seed 

 in a mixture of formalin (1) and water (320) for 20 minutes prior to 

 sowing. 



In districts where club root (Plasmodiophora brassicae) is prevalent, 

 lime the ground and do not grow cabbages on the same plot more 

 than once in three years. Cabbage, kale, rape, turnips, or radishes 

 should not be grown in succession. 



The caterpillars of the diamond-backed cabbage moth are killed 

 by an application of boiling water from a watering-can, spraying 

 with kerosene emulsion, or sprinkling with a mixture of dry lime 

 (4 pints) and tobacco dust (1 pint). 



Spray with tobacco and soap wash or kerosene emulsion, or dust 

 with soot or lime, to destroy cabbage aphis. Caterpillars are got rid 

 of by feeding with a mixture of bran, treacle, and Paris green. 



S. E. W. 



Ceropegia Thorncroftii (Bot. Mag. tab. 8458). — Transvaal. 



Family Asclepiadaceae, tribe Ceropegieae. Herb, twining, perennial. 

 Leaves 1-2 J inches long. Corolla white, with purple blotches. — G. H. 



Chamaedorea. By P. Jancke (Gartenflora, vol. lxi. pt. xv. 

 pp. 326-327 ; 1 fig.). — A hybrid, Chamaedorea concolor x Ch. Ernesti 

 Augusti, resembles Ernesti Augusti in growth and durability, and 

 concolor in the arrangement of its leaves. — S. E. W. 



Chamaedorea. By H. Koehler (Gartenflora, vol. lxii. pt. ix. 

 pp. 197-200 ; 6 plates). — The varieties of Chamaedorea are very 



