268 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



Krakatau. Flora of. By 0. Penzig {Ann, Jard. Bot. Buit. Ser. II. 

 vol.- iii. 1902, pp. 92-113; 7 figs.).— An interesting account and illus- 

 trations of the further advance in the colonisation of this volcanic island 

 by plants since 1883. It is shown that .about 32 per cent, of the plants 

 have reached the island by the agency of the wind, about 60 per cent, by 

 the agency of sea currents, and about 7 per cent, have been brought by 

 animals. There is scarcely any woody vegetation as yet. — P. G. 



Ladybirds (Journ. Hort. Jan. 29, 1903, p. 106).— An engraving 



of the seven-spot ladybird, with a note recording the great service of the 

 [arvn of this insect in clearing aphis from plants. — C. W. D. 



Laelio-Cattleya 4 Mrs. I. Leemann.' By G. T. Grignan (Rev. 

 Hort. Feb. 1, 1902, pp. 68-70; one illustration).— Raised by M. Maron, 

 between Cattlcya aurca and Lcelia Digbycma. A list is also given of 

 numerous other successful hybrids and their origin. — C. T. D. 



Laelia Digbyana and its Hybrids. By C. H. Curtis (Gard. Mag. 

 n. 2584, p. 306; 9/5/03).— The history of this Orchid from the time of 

 its introduction from Honduras in 1846 is given to the date on which the 

 first hybrid from it was produced, followed by an account of the numerous 

 hybrids that have been produced since 1889. 



Considering that this Orchid in its primitive state was the least likely 

 among its class to produce beautiful hybrids, the skill and patience of the 

 hybridist in regard to it are a triumph in the art. — W. G. 



Laelio-Cattleya 'Prince Leopold.' By Ch. Pynaert (Rev. Hort. 

 Beige, xxviii. No. 4, p. 73; coloured plate). — This is a hybrid between 

 Italia cinnabarina fecundated by Cattlcya chocoensis alba, a fine white 

 variety having no trace of colour in the labellum. The flower of ' Prince 

 Leopold ' is of a beautiful yellow-orange, uniform throughout. The 

 flowering lasts at least six weeks. — G. H. 



Lamium with entire leaves. By G. S. Boulger (Joum. Bot. 485 ; 

 pp. 150-154, 5 1903). — A critical and historical account of three forms of 

 Dead-nettle formerly occurring as weeds in botanical gardens. — G. S. B. 



Lathyrus pubescens. By Sir J. D. Hooker (Bot. Mag. tab. 7891).— 



Nat. ord. Leguminosce, tribe Viciece. Native of temperate South America. 

 This is ;i hairy, diffusely branching shrub. Leaves have one pair of 

 leaflet , the petiole forming a branched tendril beyond them. Flowers 

 with a standard of a pale violet-blue, and paler lilac wings.— G. H. 



Layering {Bull. Bot. Dep. Trinidad, No. 38, p. 546, April 1903; 

 with figure).— The description of a handy method of layering by means 

 of a bamboo Btem. Tho portion removed is cut with a dovetail to the 

 inside of the hollow, so that when replaced no retaining string is 

 required.— E. A. B. 



Layering- Aerial Branches. By Julien Oharret (Rev. Hort. March 

 16, 1903, p. 189).— To multiply plants which do not lend themselves 

 In to propagation otherwise, the writer first rings the branch just 



