658 JOURNAL OF THE ROYAL HORTICULTURAL SOCIETY. 



the most useful are given, and their preparation and application described. 

 Amongst the best are water, sprayed on with considerable force, and various 

 mixtures with petroleum, carbon bisulphide, and soft soap. The author 

 prefers the water treatment before any other. — W. G. S. 



Green Manuring", Experiments. By Otto Pitsch (Ann. Agr. 

 p. 59 ; Jan. 1902). — Comparative value of various crops : 



Common Vetch (Vicia sativa). . added 225 kilos of nitrogen 

 Canadian Vetch (Vicia canadensis). „ 115 „ 



Peas ,,205 



Blue Lupins . . • . . „ 151 „ 



White Lupins „ 115 „ 



Yellow Lupins . . . „ 115 „ 



C. H. H. 



Hedysarum multijugum (Die Gart. p. 574, August 29, 1903).— 

 The most beautiful and interesting of the whole genus. A shrub flowering 

 from spring till autumn. The leaves are pinnate and the flowers are 

 crimson-purple. — G. B. 



Heliehrysum campaneum and H. lepidissimum. By Spencer 

 Moore (Journ. Bot. 492, pp. 399-400; 12/1903).— Descriptions of two 

 new species, collected at Johannesburg by Dr. Rand. — G. S. B. 



Helleborus lividus. By Sir J. D. Hooker (Bot. Mag. tab. 7903).— 

 Nat. ord. Banunculacece, tribe Helleborece. Native of Majorca. This plant 

 was inaccurately figured in 1789 (Bot. Mag.), having been in cultivation 

 since 1710. It is a robust plant, with fleshy stems mottled with red. 

 Flowers 2^ inches across, of a dull purple-grey colour. — G. H. 



Hemp Industry in the United States. By L. H. Dewey (U.S.A. 

 Dep. Agr. Year Bk. 1901, p. 541 ; plates). — A good and well illustrated 

 article on this subject, dealing with the principal uses of Hemp, soils 

 suitable, preparation of land, breaking, seeds and varieties, &c. The 

 Hemp Plant (Cannabis sativa) is an annual belonging to the Nettle 

 family. It grows to a height of from 5 to 15 feet, and when cultivated 

 for fibre produces only a few small branches near the top of the slender 

 stalk. The fibre consists of numerous series of long cells in the inner 

 bark, firmly knitted together, which when cleaned from the surrounding 

 tissues form tough strands nearly as long as the entire plant. The Hemp 

 plant originated in Central Asia, but it is now widely distributed, especially 

 in the North Temperate Zone. 



The fibre is especially adapted for use where strength is required, and 

 is used in the manufacture of fine twines, carpet thread, sailcloth, &c. 

 Hemp is cultivated in Russia, China, Japan, Italy, Austria, France, and 

 in Kentucky in the United States. The best grades of fibre are grown 

 in Italy. As to preparation of soil, a common five-year rotation is Clover, 

 Hemp, Corn, Wheat, and Clover. 



Hemp is cut when the staminate plants are in llower. The time of 

 harvest varies from 80 to 140 days from seeding, depending on the 

 temperature and moisture. 



