040 JOUKNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



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PotatOS. By T. S. Parsons {U.S.A. Exf. Si'n., Wyoming, Bull. \ 

 86, Jan. 1911 ; plates). — Hints on the culture and management of i 

 potatos as a field crop in Wyoming, on the most suitable varieties to 

 grow there, on the control of diseases, on harvesting and storing. 

 Small potatos are not recommended for planting. Large tubers of good 

 shape are said to be the best for seed. — M. L. H. 



Potatos affected with brown-rot" as seed. By A. E. ; 



Kohler {U.S.A. Exp. Stn., Minnesota, llth Ann. Rept. 1909; p. 324). ^ 

 — This disease, which either causes browning of the tubers, spreading 

 from the vascular bundles to the flesh, but often not noticeable from | 

 the outside, or produces brown spots on the surface of the tuber, is 

 attributed to ,an undetermined species of Fusarium. Sets affected were 

 used as seed, with the result that slight a.ttack reduced the yield, while 

 bad attacks gave only about 25 per cent, of the yield from unaffected 

 tubers.— F. J. C. 



Primula sinensis, Experiments with. By E. P. Gregory, M.A. 



{Jour. Gen., i., 2; pp. 73-132; March 1911; plates).— The mheritance I 

 of a variety of characters in Primula sinefisis is discussed, and the j 

 results of experiments are detailed. The principal objects of investigation 

 have been the inheritance of heterostylism and of colour. Short-styled 

 forms are dominant to long-styled, but for som.e reason not yet deter- 

 mined, when heterozygous short-styled forms are self-fertilized there 

 is always a dearth of short-styled plants among the offspring. The 

 palmate type of leaf is dominant to the fern-leaf type, while the ' ivy- 

 leaf type,' in which the palmate leaf margin is not crenate, is 

 recessive to the normal. The ordinary form of doubleness in the flower 

 is recessive to singleness. Eye-characters appear to be inherited quite : 

 independently of any other character, but the presence or absence of 

 certain forms of eye may affect the colour of the rest of the flower. 

 The inheritance of stem colours and flower colours is discussed at 

 length, but for details reference must be made to the paper. — F. J. C. 



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Propag-ation (Seedling* Inarch and Nurse-plant), Methods of. | 



By George W. Oliver {U.S.A. Dep. Agr., Bur. PL Ind., Bull. 202, j 

 March 1911 ; plates). — An account of a new system of propagation by j 

 inarching — a method which may be used to hasten development of ! 1' 

 new seedling varieties, as a cheap and easy method of producing stock, 

 or, in the case of the mangosteen for instance, to help in tiding young 

 seedlings over a rather critical stage of their growth. The operation is 

 accurately described in all its forms — inarching seedling plants on the j 

 stems of large ones, inarching twigs of woody plants on to seedlings, I 

 and inarching sickly seedlings on to other seedlings of more vigorous [ 

 habit. Careful directions are given, and good illustrations make every- 

 thing clear. It is contended that stock may easily be raised in this 

 way in large quantities with the expenditure only of reasonable care 

 and without any special skill.— M. L. H. 



