766 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



orange-yellow, lined with purple. As L. Dighyana is now referred to 

 Brassavola, this hybrid is, strictly speaking, a Brasso-Cattlcya. — C. C. II. 



LseliO-Cattleya x Truffautiana (Cogniaux in Diet. Icon. Orch. 

 L.-C. x pi. 23 ; 9 1902). — A hybrid first raised by M. Maron, of Brunoy, 

 in 1901, between C. Doiviana aurea and L. tenebrosa. Sepals and petals 

 reddish yellow, lined with brown ; lip intense violet-purple, with a whitish 

 margin. This particular form was raised by M. Foamier, of Marseilles. 



C. C. H. 



Leaves. By Prof. A. T. Erwin (U.S.A. Hort. Soc. Iowa, 1901, 

 p. 184).— The subject of leaves is here dealt with from a horticulturist's 

 point of view. According to the writer, leaves ought to be described as 

 not only the lungs of a plant but also the stomach, since digestion as 

 well as respiration are functions of the leaf. A wet soggy soil is indicated 

 by the bilious appearance of the leaf, while from a lack of moisture the 

 tips of the leaf become brown and dead. As regards fruit-trees, a rich 

 soil with an excess of nitrogen will cause a heavy foliage and wood growth, 

 but often at the expense of the fruit, so that a poor clay soil may be 

 better for fruit-trees than a good black earth. It is evident, however, that 

 a plant can do its best work as a crop-producer only when it possesses a 

 good healthy foliage. In orchards, for instance, it is equally as important 

 to spray to preserve the foliage from disease as for the protection of the 

 fruit. In Illinois State, in the season 1898, the loss through premature 

 dropping of fruit was excessive, and upon investigation by the Experiment 

 Station it was proved that this trouble was caused by an attack of the 

 Apple scab on the leaves and young stems, thus cutting off the food 

 supply. The writer concludes with a desire to emphasise the important 

 work the leaf has to perform in furnishing us with good fruit, and hence 

 the necessity of such a system of cultivation and spraying as will best 

 protect the foliage. We should be close students of the leaf growth and 

 take advantage of any favourable variations. — V. J. M. 



Leaf-spots caused by Animals. By A. Zimmermann (Ann. 

 Jard. Bot. Buit. ser. ii. vol. ii. pt. ii. 1901, p. 102 ; 20 woodcuts and 2 

 coloured plates). — A description of the external and internal morphology 

 of spots on the leaves of certain tropical plants, includings Figs, Orchids, 

 Coffee, caused by various small animals, among which are insects, 

 especially lihynchota (Cicadas, Pcntatomus), and Pliysapoda (Thrips, 

 Heliothrips) ; Arachnida, especially Acarina (Tetranyclius) ; and finally 

 Nematode Worms (Tylcnchus). — P. G. 



Lettuce forcingr and fertilisers. By S. A. Beach and H. Hassel- 

 bring (U.S.A. Exp. Stn. New York, Bull. 208 ; December 1901).— The 

 best results were obtained on a clay loam fertilised with 5 per cent, 

 stable manure and commercial fertilisers (dried blood, nitrate of soda, and 

 sulphate of ammonia, dried blood being the best). Full details of the ex- 

 periments are given. — F.J.C 



Libocedrus, Chinese, The. By Augustine Henry (Garden, p. 183; 

 13 9/1902). — An important article upon a species lately introduced by 



