316 



JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



B. Elliottiana, the former with spathe tinted purplish rose, the latter 

 yellow. The hybrid has a white spathe veined and tinted with rose. 



C. T. D. 



Riehardia Elliottiana. By S. Mottet (Le Jard. xxii. 523, p. 363 ; 

 coloured plate in No, 524). — An interesting horticultural account of 

 the Riehardia (Calla) family, several well-known species of which are 

 recapitulated. B. Elliottiana, the yellow species with white spots on its 

 leaves (being thus distinct from B. Pentlandi, which has no spots), is 

 described at length, and the question raised as to whether the variety 

 with sulphur flowers is a distinct type or not. M. Mottet recommends 

 the name of B. Elliottiana var. sulfurea. There seems no reason why 

 these varieties should not be as plentiful in the market as the common 

 white Arum Lily. The same greenhouse treatment answers admirably. 

 B. Elliottiana is easily propagated (a) by seed, which when ripe can be 

 kept in fairly dry sand, and sown February or March, in greenhouse or 

 hot-bed. The seedlings are then treated like the mature plants, and 

 flower in their third year, (b) By division of corms, or more simply by 

 separation of the offsets. This can only be done when the corms are 

 vegetating, otherwise they will rot. The pieces are then planted in 

 small pots or loose soil on the floor of a warm house ; they usually 

 flower from the end of the second year. As soon as the Riehardia is out 

 of flower, the corms must be taken up, dried, and kept away from frost. 



F. A. W. 



Roots, Emergence of. By R. H. Pond (Bot. Gaz. vol. xlvi. pp. 410- 

 421 ; December 1908 ; 3 figures). — The author finds that the lateral 

 roots of the Bean and white lupine have no digestive action upon the 

 cortex but simply push their way out from the central cylinder through 

 the cell.— Or. F. S.-E. 



Rose, New Wichurian. By H. Martinet (Lc Jard. xxiii. 525, p. 3 ; 

 January 5, 1909). — Bosa Wichuraiana 'Joseph Billiard,' cross between 

 B. Wichuraiana and Rose ' Mme. Eugene Resal.' Rich yellow apricot, 

 with brilliant pink inside the petals. When fully expanded, the roses 

 measure 7*5 cm. across, with a white centre. The flowers grow in clusters 

 of three to five.— F. A. W. 



Rudbeckia purpurea. By S. Mottet (Le Jard, xxiii. 526, p. 29 ; 

 January 20, 1909 ; 2 figs.). —Also known as Echinacea purpurea, Moench. 

 Though not rare, this plant deserves to be more widely grown, There are 

 several varieties of the type : atropitrpurea, rosea elegans, intermedia, 

 1 Winchmore Hill,' &c. All these are best sown in a cold frame, pricked 

 out, and planted in borders at the end of the summer. They will flower 

 in the second year, but are best in the third and fourth, and should be 

 used in clumps. — F. A. W. 



San Jose Scale, Self-boiled Lime-Sulphur Mixture as Summer 

 Treatment for. By A. L. Quaintance. (Jour. Econ. Entom. ii. 2, 1909, 

 p. 1 30). — The use of self-boiled lime-sulphur mixture (Jour. B.H.S. xxxiv. 

 p. 360) against the San Jose Scale in the summer has given promising 

 results, the young scales, particularly, being killed. Lead arsenate may be 



