226 Some Diseases of Plantation Rubber in Malaya 



and the stem of the host in the immediate vicinity is abnormally 

 developed, the whole producing a large knob of hypertrophied tissue. 

 Other suckers which are much closer together than the former kind 

 are not associated with any marked hypertrophy of the host. 



The leaves of these species of Loranthus are extremely variable in 

 size and shape. Plate XXXV, figs. 6 and 7 are photographs of one of 

 the kinds of Loranthus which affects rubber trees showing the creeping 

 stems and the hypertrophied tissue where the parasite penetrates the 

 host deeply. 



In conclusion I wish to express my hearty thanks to Mr F. de la 

 Mare Norris of the Agricultural Department, Federated Malay States, 

 for permission to reproduce his drawings of Sphaerostilbe repens in 

 Plate XXXIII, figs. 1 and 2, and for making the drawings for Plate 

 XXXIV, fig. 4 and Plate XXXV, fig. 5. I am also indebted to 

 Mr A. Sharpies of the same department for taking for me the photo- 

 graphs used in Plate XXXV, figs. 6 and 7. 



REFERENCES. 



1. Bancroft, C. K. (1911). The die-back fungus of Para rubber and of cacao. 



Bull. No. 9, Dept. of Agric., Federated Malay States. 



2. Bancroft, C. K. (1912). Notes on investigations of plant diseases in the 



Federated Malay States during 1911. Agric. Bull., F. M. S., Vol. I, p. 30. 



3. Bateson, E. (1913). Burr Formation. Agric, Bull., F. M. S., Vol. i, p. 446, 



and Vol. n, p. 24. 



4. Bateson, E. (1911). Agric. Bull., Straits Settlement and F. M. S. 



5. Brooks, F. T. (1915). A disease of Plantation Rubber caused by Ustulina 



zonata. New Phytologist, Vol. xiv, p. 152. 

 <>. Brooks, F. T. (1914). Parasitic Flowering Plants on Rubber trees. Agric. 

 Bull, F. M. S., Vol. ii, p. 105, and Vol. in, p. 7. 



7. Brooks, F. T. and Sharples, A. (1915). Pink Disease of Plantation Rubber. 



AnnnJs of Applied Biol., Vol. n. p. 58. 



8. Brooks, F. T. and Sharples, A. (1914). Fungoid Diseases of Rubber Trees 



in Malaya. Report of the International Rubber Congress and Exhibition, 

 Batavia, p. 41. 



9. Colenbrander, H. (1914). Treatment of three year old Hevea brasiliensis 



attacked by Fomes semitostus. Report of the International Rubber Congress 

 and Exhibition, I'.atax [a, p. 51. 

 K>. Petoh, T. (Hill). The Physiology and Diseases of 11, w n brasiliensis. 

 London. 



11. Petoh, T. (lid 4). The Fungus-diseases of Hevea brasiliensis. Rubber-recueil, 



International Rubber Congress, Batavia, p. 116. 



12. Riohabds, R. M. (1914). Mycologist' 's Report for L912 13. TheMalay Peninsula 



Agricultural Associal ion. 



