146 JOURNAL 0]? THE ROYAL HORTICULTURAL SOCIETY. 



Ground Nuts, Diseases of. By F. W. South {West Indian Bull. 

 vol. xi. No. 3, 1911). — Three diseases of ground nuts have been 

 reported from the West Indian islands : 



1. A rust fungus attacks leaves; amount of d,amage varies. 



2. A leaf spot attacks leaves; damage uniraportant. 



3. A root disease (unidentified) occurs in Barbados, Gr,anada, 

 Dominica, St. Kitts, and Nevis. Its host plants ate numerous, and 

 of ^ very general nature. It is an important fungus, difficult to 

 control. — C H. L. 



Ground Nuts in West Indies, Notes on {West Indian Bull 



vol. xi. No. 3, 1911). 



1. The disinfection of nuts by immersion for five minutes in a 

 solution of corrosive' sublimate (1 in 1000) before planting is recom- 

 mended. 



2. The most suitable varieties are the Spanish and Carolina running 

 -Varieties. 



3. An application of ]200 to 2400 lb. of lime to the acre is 

 advantageous, especially in Dominica, Montserrat, and Nevis. 



4. Gradual acclimatization may reduce the harm caused by fungi, 

 and with seed selection increase the yield of different varieties. 



5. The extended cultivation of ground nuts will prove a useful 

 addition to the agriculture of the islands. — C. H. L. 



Hazelnuts. By E. Gross {Oestr. Gart. Zeit. vol. vi. pt. xii. 

 pp. 441-3).— The most profitable nuts for market are * Lambert, 

 * Merveille de Bollweiler, * * Princess Eoyal,' and the English cob. 



S. E. W. 



Heliotrope, * Mathilde Cr^mieux ' {Rev. Hon. p. 515; Nov. 16, 

 1911).— Highly recommended as a very beautiful variety, resisting 

 both prolonged drought and persistent humid conditions, as exem- 

 plified by the dry and wet summers of 1911 and 1910. Eaised by 

 M. Bruant.— C. T. D. . 



Heredity, Alteration through Ovarial Treatment. By D. T. 



MacDougal {Bot. Gaz. pp. 241-57, April 1911; 8 plates, 3 figs.).— The 

 author has found that distinct differences in seedlings may be produced 

 by injecting various substances (zinc sulphate, sugar solution, methyl 

 blue, &c.) into ovaries when this is done about twenty-four hours before i 

 fertilization. Eehmamiia seedlings became annuals and were quite' 

 glabrous. Oenothera biennis (zinc solution) showed marked reaction 

 to this treatment. The differences are given in full. Both the original 

 and the derivative have distinctly changed when removed to different 

 localities. The derivative has wider leaves and is more able to endure 

 a mountain climate than the parent. ' It also has more red in the 

 leaves. 



Hybrids of derivatives with the parent are intermediate ia 

 character. 



There is also in the paper an interesting description of the conse- 



