282 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



been introduced to this country are described, and notes upon their 

 distribution, habitats, and habits are given at length. A few of those 

 introduced, such as Vaccinium glauco-alhum, are hardy only in the 

 most favoured localities in Great Britain, but most may be grown 

 where leaf -mould is available and lime absent from the soil, though 

 all prefer sandy peat and a moist position, and are worthy of cultiva- 

 tion for the generally neat, close habit, handsome fruits, and frequently 

 rich autumnal colouring. The nearly allied cranberries, species of 

 Oxy coccus, and Chiogenes serj)yllifolia (the creeping snowberry) form 

 the subject of a further article on p. 99. — F. J. C. 



Velvet Bean and its History, The Florida. By K. S. Bort 

 (U.S.A. Dep. Agr., Bur. Plant, hid., Bull. 141, part iii. ; May 1909; 

 3 plates, 1 fig.). — The bulletin contains good illustrations and much 

 documentary evidence on the subject of the history of the velvet bean, 

 stated to be the most important leguminous forage crop grown in 

 Florida.— y. G. J. 



Veronica Chamaedrys, Tubers on. By J. E. Blomfield and 

 E. J. Schwartz (Ann. Bot. xxiv. January 1910, pp. 35-43; 1 plate). — 

 A morphological and cytological account of the life-history of the 

 myxomycete Sorosphaera veronicae. The swelliugs were found on the 

 stems, leaves and petioles. Infection apparently takes place in the 

 region of the growing point. When the invasion is extensive the whole 

 shoot is modified; but when less the growing point frees itself and a 

 tumour is formed on the side of the stem. 



Sorosphaera resembles Plasmodiophora in its method of growth and 

 also in nuclear details. A Plasmodium-like structure is formed in the 

 host-cells, and this ultimately gives rise to a crop of sorospheres (spore- 

 masses). The Plasmodium is not formed by an aggregation of amoebae, 

 but from the growth of a single spore. The infected areas increase in 

 size by the division of already infected cells. — A. D. C. 



Viburnum Carlesii (Gard. Chron. xlv. (1909), pp. 341 and 361; 

 fig.). — The history of this beautiful Chinese Viburnum, quite hardy 

 in this country, is given, with notes upon its behaviour in cultivation 

 at Kew.—F. J. C. 



Wahlenbergia, Species of. By T. Smith (Gard. Chron. xlv. 

 (1909), p. 243; figs.). — The author describes the species and varieties 

 of Wahlenhergia suitable for cultivation in the rock-garden, and 

 gives hints upon their cultural requirements, insisting upon the 

 need for directing water to the roots of the plants and preventing 

 it from remaining upon the foliage, especially in winter and 

 spring. — F. J. C. 



White Fly (Aleyrodes citri, &c.). By E. W. Berger (U.S.A. 

 Exp. Stn. Florida; Rept. 1908; pp. 48-58). — Fungi for the suppression 

 of this pest on citrus trees have been successfully distributed, and it 

 is concluded that the insects themselves carry the fungus to other 



