428 MANUAL OF TROPICAL AND SUBTROPICAL FRUITS 



to contain 1.13 per cent of protein, 1 of acid, and 4.9 of 

 sugar. 



In its climatic requirements the plant is distinctly tropical. 

 Wester says : " The lanzone is of vigorous growth and succeeds 

 best under somewhat the same climatic conditions as the 

 mangosteen. It will not grow where there is a pronounced 

 or prolonged dry season, and in the Philippines it is usually 

 grown in half-shade interplanted with the coconut." Experi- 

 ments indicate that it is not suitable for cultivation in Florida 

 or California, the climate of both states probably being too 

 cold for it. In Cuba and the Isle of Pines it has shown more 

 promise. 



Little is known regarding cultural methods, since the lang- 

 sat usually occurs in the Malayan region as a dooryard tree, 

 or along roadsides, where it receives no cultural attention. 

 Propagation is commonly by seeds, which should be planted 

 as soon as possible after they are removed from the fruit ; but 

 Wester has shown that cleft- and side-grafting are successful, 

 and one or the other of these methods should be used to propa- 

 gate choice varieties, and to insure early fruiting. \Yester 

 says : "The cion should be well matured but not of old growth, 

 2J to 3J inches long, J to f inch in diameter, and inserted in 

 the stock 2J to 4 inches above ground ; when at that height it 

 is J to | inch in diameter ; cover all wounds with grafting wax. 

 Shield-budding has been done but the percentage of successful 

 buds is small." 



The langsat occurs in two distinct forms, one termed langsat 

 and the other duku or doekoe. The typical langsat is borne in 

 clusters of five or six up to twenty or thirty, and the individ- 

 ual fruits are round or oval in form, about an inch long, with a 

 comparatively thin skin. The duku is produced in small 

 clusters of two to five fruits, and is round, from 1 to 2 inches 

 in diameter, with a thicker, darker-colored skin more leathery 

 than that of the langsat. 



