117 



Polyembryony was also very common in the rose-apple {Eugenia 

 Janibos) but usually the number of seedlings did not exceed three 

 from a single seed. Examina- 

 tion of the mature seeds showed 

 that they also were separated 

 into pieces as in the case of the 

 orange and the mango. How- 

 ever, there were usually two or 

 three, rarely more large pieces 

 and a number of very small 

 pieces. The seedlings were pro- 

 duced from the large pieces. 

 Apparently this is another case 

 of adventive seedlings, the same 

 as found in the orange and the 

 mango. 



The writer made an attempt 

 to study the embryology of these 

 species but the material was un- 

 satisfactory and he did not have 

 another opportunity to collect 

 material before leaving Cuba. 



The mango is recognized as a 

 very important fruit in the tropics 



and also as one which presents great commercial possibilities. But 

 before it can be of very great value it must be the subject of care- 

 ful study and experimental work by the plant-breeder and the 

 horticulturist, and then this tendency to polyembryony will pre- 

 sent a much more complicated problem than in the case of the 

 orange, since on account of the character of the foliage it will be 

 much more difficult to determine which of the embryos are true 

 hybrids. 



Delaware Agricultural Experiment Station, 

 Newark, Delaware. 



Figure 3. Three seedlings of 



Rugenia Jainbos from a 



single seed. 



