HOWARD, HOWARD AND ABDUR RAHMAN. 301 



in a plot of wheat which had been grown from one plant selected 

 in 1906. 



The three cases of natural crossing in cultivators' fields in 

 North Bihcir were as follows : In the first case, a bearded smooth 

 red chaf? ear, sown in 1908, split up into red and white chafT plants 

 in 1909. In the second case, one ear of a black awned common 

 wheat with blackish chaf!, sown in 1908, gave rise in 1909 to two 

 kinds of plants— plants with black chaff on a red ground and 

 plants with black chaf! on a white ground. One of each of these 

 two classes of plants weve sown in 1909 and during the present 

 year (1910) both have split still further. The plant with black 

 chaf! on a white ground gave white chaff plants as well as plants 

 like the parent ear. The plant with black chaf! on a red ground 

 gave four classes of plants, white chaf!, red chaff, black chaf! on 

 a white ground, and black chaf! on a red ground. The third 

 case was observed in a bearded smooth chaf! ear sown in 1908 

 which gave rise to apparently uneven progeny in 1909. It was 

 not possible to determine with certainty the characters of the 

 chaf! of the progeny of this culture in 1909 as the plants ripened 

 late and were not fully developed. Eight single plants were 

 selected and sown separately in October 1909. Six of these 

 came uniform like the original parent and two split, one into red 

 and white chaf! and the other into red, white, black on white 

 and black on red chaf!. 



The two cases of natural crossing which have been proved 

 in the Botanical area at Piisa are the following. A slightly 

 bearded white chaf! phmt was observed in 1909 in one of the plots 

 raised from a single ear in 1906. This when sown separately gave 

 slightly bearded, beardless and fully bearded ears in 1910. The 

 second case was observed in one of the single ear cultures of 

 Bengal wheats in 1909 when a white chaff bearded ear gave 

 bearded white chaf! plants, and one black chaff plant in 1909. 

 This latter sown separately in the same year gave, in 1910,, both 

 white and black cliaff plants. 



