21 



22.) This was found to bo a eharactiM- of tho poricarp, for whon tlio 

 latter is puilod oti' from such kernels and held up to the liyht it is 

 seen to be marked with alternate opaijue and hyaline stripes which arc 

 irregular and run longitudinalh'. In this experiment, made at Lin- 

 coln, Nebr., in the sunmier of 18m>, the seed of Hickory King used 

 as the female parent was from an ear inbred by the writer the ].re- 

 vious season, and known to be pure. 



Experiment l<Sa, 18h, and 18c, three earn of Learning Yelhm ^ X 

 Cnzco 7a $ . — (The plant of Cuzco Ta furnishing the pollen in ihose 

 three experiments was from a yellowish-whit(> kernel j)ro(lu..-c(l I)}' 

 inbreeding C'uzco No. 7<)0 the preceding year. See description., \). 14.) 

 Three poorly tilled ears resulted, which were apparently unifoi-m in all 

 important characters. The kernels were yellow'ish on the sides like 

 typical Learning Yellow, l)ut with w hitish apexes. This must proba- 

 bly be considered as a result of xenia, as the white color pr()])ably pre- 

 dominated in the male parent, though known to be of a Aariabl(> rac(\ 

 A comparison of the endosperm of the kernels of the crossed ear with 

 those of typical Learning Yellow show^ed very little, if any, reduction 

 of the corneous matter, which was very marked in expei'iment lOa. 



E^perimenU 19a and lOh^firo eai-s of Learn ln<j Yelhm 9 X Ckizco No. 

 755,?.— Only a few^ kernels developed on each ear, all resem))ling 

 Learning Yellow, no xenia being apparent. 



Experiment Wa, Fedrich^H Perfected. Oolden Beauti/ 9 X Casco 

 7a S . — (The plant of Cuzco Ta furnishing the pollen in this experi- 

 ment was from one of the dark purplish kernels produced by inl)reed- 

 ing Cuzco No. 760 the preceding year. See description, p. 14.) A 

 small well-tilled ear containing something over 300 kernels resulted. 

 None of these were like the normal Pedrick. The great majority were 

 of a heliotrope-purple or plumbeous color at the apex or various com- 

 binations of these two colors, gradually fading on the sides to yellow- 

 ish-white. The base and lower half of the kernels in most cases were 

 yellowish-white or yellow, suggesting the color of the female parent, 

 but not so deep an orange. Some few kernels were whitish or yellow- 

 ish-white thioughout, there being three or four of this sort. Two 

 kernels were curiously marked, being half white and half heliotrope- 

 purple, exhibiting a sharp line of demarcation between them. (PI. I, 

 tig. 24.) In these cases when the pericarp was pulled ofi' over the line 

 of demarcation the color was found to be entirely in the aleurone 

 layer. In quite a number of the dark-colored kernels also, which 

 were examined, the color was found to be limited to the aleurone 

 layer. Practically every kernel of this ear showed xenia very plainly. 

 The seeds of the female parent, while not bred under the writer's 

 direction, were grown by a careful seedsman under control conditions, 

 and were probably free from impurity. Furthermore, the plants 

 from this seed which were inbred came perfectly true to type, and the 

 ears which were developed in the plat without inbreeding and without 



