130 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Beans. By L. C. Corbett (U.S.A. Dep. Agr., Farm. Bull. 289; 

 10 figs. ; April 1907). — Deals with this important group of plants, including 

 broad beans, kidney beans, lima or sugar beans, dolichos beans, soy 

 beans, scarlet runner beans, velvet beans (Mucuna utilis) and cow peas 

 (Vigiia sinensis). The preparation of the soil, planting, cultivation (when 

 dew is not on the plants), harvesting, cleaning and grading, fertilisers 

 suitable, and diseases are all dealt with. — F. J. C. 



Beans, Mildew of Lima. By G. P. Clinton, Sc.D. (U.S.A. Exp. 

 Stn. Conn. ; 13 plates ; May 1906). — This annual report of the botanist 

 for 1905 is concerned chiefly with the downy mildew of the Lima bean, 

 and potato (Phytophthora), the former of which is recorded for the first 

 time as producing oospores, of which there is a detailed account ; and 

 the question of oospores in the potato mildew is discussed in about twenty- 

 four pages. The other fungous diseases reported upon are of less im- 

 portance, and include a fruit-speck on apple, cause undetermined ; pod and 

 leaf blight of Lima bean, Phoma subcircinata (E. and E.) ; leaf spot of 

 Japanese catalpa, Macrosporium catalpac ; leaf scorch of sugar maple, 

 not yet identified ; brown rot of the nectarine Sclerotinia fructigena ; 

 wilt of okra, Neocosmospora vasinfecta ; brittle of onion, Fusarium sp. ; 

 bacterial black spot on plum, Pscudomonas pruni ; and a damping-off of 

 tobacco, Sclerotinia sp. — M. C. C. 



Beet Seed : Development of Single Germ. By C. O. Townsend 



and E. C. Rittue (U.S.A. Dep. Agr., Bur. PI. Inch, Bull. 73; 8 plates 

 and 6 figs. ; 1905). — An endeavour is being made to produce beet 

 "seed" containing only a single germ, as it is believed that such will 

 materially lessen the labour of thinning. An account is given here of 

 the methods of selection and cross-pollination adopted with this end 

 in view. — F. J. C. 



Beg-onia Rex, Some curious Results of Layering-. By Max 



Gamier (Rev. Hort., February 1, 1906, p. 61). — Leaves taken with their 

 entire stalks, the bases of which are inserted a short distance in the 

 soil, support being afforded by sticks, root, and develop buds on the 

 summit, forming tufts of leaves, standard fashion. The stem, however, 

 does not thicken or become woody, and requires continued support. It 

 jias also been found that the original leaf, even if developed already to full 

 normal size, will resume growth and become of exceptional dimen- 

 sions.— G. T. D. 



Begfonias, New (Le Jardin, vol. xxi. No. 480, p. 60 ; 2 figs. ; 



February 20, 1907), Begonia Gayeuxi (Cayeux and Leclerc). — Fine 

 decorative hybrid from B. sempcrjlorens gracilis rosa crossed with 

 B. lucida t the fertile hybrid obtained being crossed in its turn with 

 B. gracilis rubra. Hardy plant with abundant flowers, a little taller 

 than B. sempcrjlorens. 



Begonia hybrida gigantca 'Princesse Royale ' (Heinemann).— New 

 hybrid with magnificent carmine flowers and white centres. 



B. semperflorens * Gloire de Chatelaine ' (Rivoire). — New variety ; 

 one of the finest semper c irens ever produced. Resembles ' Gloire de 



