186 JOUENAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Viburnum Davidii. By D. {Garden, p. 204, April 29, 1911).— 

 This is one of a number of new Viburnums introduced within the last 

 few years from Western and Central China, but known for a much 

 longer period from herbarium specimens, for it was collected by Pere 

 A: David in Mupin in 1889 and described by Franchet ('* Plantse 

 Davidianse," vol. ii. p. 69). It is evergreen, from 1 to 2 feet high, 

 the leaves are ovate, 4 to 6 inches long, 1| to 2 J wide, with toothed 

 margins ; the surface is peculiar by reason of three strong nerves which 

 form an ellipse with a ^-inch margin. The flower buds are set in 

 autumn and remain dormant all winter, to open into moderate-sized 

 white flowers during spring. Being found at an altitude of 8,400 feet, 

 it ought to prove hardy. — H. R. D. 



Viburnum Henryi {Bot. Mag. t. 8393). — China. Family, Capri- 

 foliaceae; tribe, Sambuceae. Shrub, 10-14 feet high, showy in fruit, 

 evergreen leaves, 2-4 inches or even 6 inches long. Flowers, small, 

 pale yellow, densely panicled. Drupes, coral-red at first, at length 

 almost black. — G. H. 



Viburnum pubescens. By K. Josefsky {Oestr. Gart. Zeit. 

 vol. vi. pt. X. pp. 391-2). — Viburnum pubescens, a variety of dentatum, 

 V. erosum, V. ellipticum and V. Demetrionis are too seldom seen in j 

 our gardens. — S. E. W. I 



Viburnum rhytidophyllum {Bot. Mag. t. 8382).— Western I 

 China. Family, Caprifoliaceae. Shrub or small tree, evergreen. 

 Leaves 4-10 inches long. Flowers, white, 2^-3^ in. across. Fruit, 

 J inch long, at first bright red, ultimately black polished. — G. H. 



Violet Root-Rot (Maladie du Pied de la Violette). By Et. 



Foex {A?in. de VEcole Natt. d'Agric. de Montpellier, x. ; 1910; 

 plate). — A root-rot of violets characterized by having blackish areas 

 in parts of the root and on the portions of the stem below the surface 

 of the soil. The whole plant languishes, the leaves are small and ; 

 yellowish, and the flowers few in number. It is recommended thatj 

 the soil should be saturated with a solution of formalin 1 part to 

 40 parts of water, where plants have been attacked, and that healthy 

 runners only should be used in propagation. The fungus involved is 

 Thielavia basicola. — F. J. C. 



Walnuts without Shell. By Pierre Passy {Rev. Hort. p. 567; 

 Dec. 16, 1911). — Description of a variety with laciniate foliage, Juglans 

 regia type, with nuts merely protected by a parchment-like skin. Habit 

 of tree like that of the common walnut. Raised by M. Jamin, 

 Bourg-la-Reine.— C. T. D. ; 



Watering^ of House Plants {Oestr. Gart. Zeit. vol. vi. pt. xii.j 

 p. 468),— Warm water must not be used for watering plants in the 

 house. The temperature of the water should be that of the room in 

 which the plants live. — S. E. W. 



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