POLYEMBRYONY IN PLANTS 



Seeds of certain plants sometin^es contain several embryos. The mango, 

 the rose-apple (Eugenia jambos), and the citrus fruits are all known to 

 possess this characteristic- Above are shown several plants arising from 

 a single seed of the mang(9. It is presumed that one of the embryos 

 develops from the fertilized egg-cell; the remainder are derived from the 

 tissue of the nucellus by budding. These adventitious embryos produce 

 plants whose fruit resemble^' that of the';f)arent tree as closely as that of a 

 grafted individual. By this means, in fact, numerous seedling races of 

 m.angos and citrus fruits .are propagated in the tropics. (Fig. 5.) 



