2C^ 



corn gTovvers. In the oxperinunitsil plats iit Lincoln, Nebr., whoro a, 

 number of races were grown from seed obtained from careful seeds- 

 men (see histor}^ of sorts grown, pp. 14, 15), several marked instances 

 of change in color were noted which must probabl}^ be attributed to 

 xenia. Hickory King, Champion White Pearl, Boone County White, 

 and Burr's White, all pure white races, showed many yellow kernels, 

 evidently from crossing with pollen of yellow races. Pedrick's Per- 

 fected Golden Beauty and Leaming Yellow, pure orange-yellow races, 

 lioth produced many kernels having white apexes evidently from cross- 

 ing with white sorts. It would seem to be a very common thing in 

 crossing yellow and white dent races for the apexes of the kernels to l)e 

 changed in color while the sides and bases of the kernels remain the 

 same, or nearly the same, as in the mother parent. Whitecap Dent 

 showed many kernels with orange or yelhnv apexes or caps instead of 

 white as in the parent race, an effect probably due to crossing Avith a 

 yellow dent pollen. 



In all of the dent races considered above in this section (Dent X Dent) 

 the color is in the endosperm, the pericarp and the testa being hyaline. 

 The color, therefore, we should expect to be shown as xenia if the 

 endosperm is developed from a hybrid nucleus, as would be the case 

 if corn has double fecundation the same as the lily. What occurs in 

 the case of those races, however, like the red dent, where the color is 

 in the pericarp? The writer has made no experiments with races of 

 this sort, and thus can not answer the question. Kellerman and Swin- 

 gle in their experiments above referred to used a red dent in a number 

 of combinations, and while no statement is made as to the location of 

 the color in the race which they used, it was doubtless located in the 

 pericarp, as this is the case with all red dent sorts which have come 

 under the writer's observation. Nine ears of yellow dent races which 

 they crossed with pollen of red dent showed no indication of xenia so 

 far as color was concerned. Of ten ears of white dent crossed with 

 pollen of red dent nine ears showed no indication of xenia in the trans- 

 mission of color, while one case, that of Shannon's Big Tennessee White 

 9 X red dent ^ , is recorded as showing evidence of the cross in the 

 color of the kernels. Whether this is a true case of xenia or due to 

 impurity of seed or other cause can not be determined. It should be 

 noted that the ear resulting from the cross is described as "not suffi- 

 ciently matured for complete description and comparison. " Some races 

 of white dent even when, comparatively speaking, of perfectl}' pure 

 strains show a tendency to exhibit a red or scarlet flush when they dr}- 

 up before maturity and become somewhat moldy. Kellerman and 

 Swingle also describe a case where red dent 9 X Riley's Favorite S , 

 a yellow dent, produced light-yellow grains like the male parent. As 

 in the last-mentioned case, it can not be determined whether this is a 

 case of true xenia or due to other causes. In none of these experi- 

 ments so far as recorded was the seed grown previously and proved to 



