NOTES AND ABSTRACTS. 



619 



across, very double carmine -salmon turning to carmine (a new colour 

 in this section); 'Joseph Billard ' (TP. x 'Madame Eugene Resal '), 

 vigorous, flowers 3-8^ inches diameter, dazzling carmine ; ' Francis 

 Jauranville ' (TP. x ' Madame Laurette Messimy '), very large double 

 flowers, bright rose; and 'Joseph Lamy ' (same cross), flowers semi- 

 double, porcelain white, slightly pink when opening. — C. T. D. 



Rubber Cultivation in the West Indies (Joum. Imp. Dep. Agr. 

 W.I. 1907).— The records of the rubber industry reported to the West 

 Indian Agricultural Conference, 1907, include the following : 



Rubber Cultivation in Jamaica. By Hon. T. H. Sharp, Jamaica 

 (Joum. Imp. Dep. Agr. W.I. 1907, 2). — Being suggestions as to soils, 

 species of rubber-plants, &c, consequent on rubber cultivation being 

 taken up seriously in Jamaica by several planters. 



Progress of Rubber Industry in Trinidad. By J. H. Hart, F.L.S. 

 (Joum. Imp. Dep. Agr. W.I. 1907, 2). — After noting that in 1901 there 

 were six different kinds of rubber plants in experimental cultivation, it 

 proceeds to record that since that period Castilloa rubber planting had 

 steadily continued, and had done well in all parts of Trinidad, and 

 appears to suit the conditions of soil and climate. 



Other notices are given of Hevea or Para rubber and other kinds, 

 ending with the statement that the rubber industry is now well 

 established in Trinidad, and there is a prospect of abundant success. 



Rubber in British Guiana. By Hon. B. Howell Jones (Joum. Imp. 

 Dep. Agr. W.I. 1907, 2). — Chiefly indicating the species of rubber trees 

 which are indigenous, such as species of the genus Sapium, and to some 

 extent of Hevea, with suggestions that the only rubber trees of the 

 colony worth consideration are certain species of Sapium. This genus 

 belongs to that large family of plants, the EupJwrbiaceae, to which 

 Hevea, Manihot, &c, also belong. 



Summary of Results of Tapping Rubber Trees in Dominica and 

 St. Lucia. 



These experiments chiefly have reference to trees of Castilloa, and 

 three questions are proffered to form the basis of future experiments. 



1. Which system of tapping will give the maximum yield of rubber 

 for the labour employed? 



2. Can Castilloa be repeatedly tapped by successively paring the 

 lower edges of the original incisions, as is practised on Hevea in Ceylon ? 



8. How frequently this or any other method of tapping may be 

 safely and profitably employed ? — M. C. C. 



Rusts, The Cereal, i. The Development of their Uredo 

 myeelia. By J. B. Pole Evans (Ann. Bot. vol. xxi. October 1907, 

 pp. 441-463 ; 4 plates). — The author has undertaken a comparative 

 histological study of the rust fungi (Uredineae) which attack cereals. 

 In the present communication he brings forward his observations on the 

 uredo stage of the parasites. 



He distinguishes three phases in the development of a uredine : 

 (1) the attack by the parasite on its host, or the first phenomenon of 

 occupation ; (2) the course taken after occupation by the further growth 



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