NOTES AND ABSTEACTS. 



151 



At the same time the combination of encrustation and lens-cells is 

 regarded as distinctly advantageous. An encrustation of uniform thick- 

 ness and colour would be better protection against insolation, but in 

 that case the interior of the plant would not be illuminated at all. 

 With the development of the papilla, a small fraction of the upper 

 surface of each epidermal cell is available for the collection of light rays, 

 whilst the remainder is under a protective cover. The protection is 

 extended to the papillae, which are covered with a fine incrustation, 

 but as a compensation, are more highly developed as light ray 

 collectors. — A. B.C. 



LeonotiS dysophylla {Bot. Mag. t. 8404).— S. Africa. Family, 

 Labiatae; tribe, Stachydeae. Herb, 2-3 feet high. Leaves, ovate- 

 lanceolate, tapering below, 3-3| inches long. Whorls solitary or two 

 superposed. Corolla, orange inches long. — G, H. 



Lilies and Sunshine. By A. Grove {Gard. Chron. p. 131, 

 March 2, 1912). — A review of the behaviour of Lilies in cultivation 

 during the hot, dry summer of 1911. — E. A. B. 



Lilium myriophyllum. By A. Grove {Gard. Chron. p. 272, 

 April 27; with 2 figs.). — -Points out differences in bulb and flower 

 between the plants distributed by Leichtlin and those collected later 

 by Wilson under this name. — E. A. B. 



Lime Sulphur as a Fung-icide (U.S.A. Dep. Agr., Farmers" 

 Bull. 435, pp. 12-15; March 1911).— The use of some kind of lime- 

 sulphur as a substitute for Bordeaux mixture in combating fungus 

 diseases of the orchard is at the present time of great interest to 

 fruit-growers. Bordeaux mixture is the standard fungicide, but on 

 certain varieties of trees and under certain weather conditions this 

 causes damage to the foliage and often russets the fruit, especially 

 when used during the summer. Consequently there is a demand for 

 a spray that can be used on the foliage of these more sensitive trees 

 without injury, and yet control the prevalent and injurious fungus 

 diseases to which they are subject. 



The self-boiled lime-sulphur mixture of Scott, which was developed 

 primarily for spraying peach-trees, is the spray commonly meant when 

 speaking of the self-boiled lime-sulphur preparations. It is made by 

 using eight pounds of fresh stone-lime and eight pounds of sulphur — - 

 either flowers or flour of sulphur — to fifty gallons of water, commonly 

 designated as an 8 : 8 : 50 mixture, or the strength may vary from 

 6 : 6 : 50 to 10 : 10 : 50, governed by the time of year it is to be applied, 

 the kind of fruit-trees to be sprayed, and the fungus to be controlled. 

 Ihe mixture can best be prepared in rather large quantities, say, 

 enough for 200 gallons at a time, making the formula 32 pounds of 

 lime, 32 pounds of sulphur, to he cooked with a small quantity of 

 water — eight to ten gallons — and then diluted to 200 gallons. The 

 lime should be placed in a barrel and enough water poured on to almost 



