No. 528] INHERITANCE IN PLANTS 



74:; 



Size, Shape and Weight of Bean Seeds. — Numerous 

 crosses of beans differing in size and shape of seeds 

 have been under observation. In only a few cases, how- 

 ever, have exact measurements been made. It will be 

 sufficient to report here combinations of three races: 

 Fillbasket Wax with large flat seeds; Longfellow with 

 long, slender seeds; and Snowflake Navy with small 

 round seeds. The mean dimensions, shapes and weights 

 and the coefficients of variation for parents, Y 1 and F 2 , 

 are given in the tables below. The parent races and the 

 F t plants from which these records were taken were 

 grown in the garden at Lincoln in 1909. The F 2 plants 

 were grown in a greenhouse during the following winter. 

 The different generations are not, therefore, perfectly 

 comparable. In general the various races of beans and 

 F x plants that have been grown from time to time both 

 indoors and out have not been observed to exhibit 

 greater variations when grown in the greenhouse than 

 when grown in the garden, though the dimensions and 

 weights of seeds are often noticeably larger in case of 

 greenhouse-grown plants. 



In case of the beans, summer squashes and gourds, 

 the mean dimensions and shapes of both ¥ x and F 2 are, 

 with some exceptions, more or less like those of the mid- 



r Hybrid. \ Weight, Length, 



