38 



DESCRIPTION OF PLATE I. 



[Figs. 1-31, iiiitural size; fig. 32, x 200 diam.] 



Figs. 1 and 2. — Hickory King: Anterior and posterior view of kernel. 



Figs. 3 and 4. — Cuzco 759: Anterior and posterior view of plumbeous-colored 

 kernel. 



Fig. 5. — Cuzco 759: Posterior view of a mottled kernel, the color of which is all 

 in the aleurone layer of the endosperm. 



Fig. 6. — Cuzco 759: Posterior view of a mottled kernel, the dark blotches being 

 due to color in the aleurone layer of the endosperm, and the reddish ferruginous 

 flush tx) color in the pericarp. 



Figs. 7 and 8.— Cuzco 760: Two kernels showing anterior and posterior views. 



(The kernels of Cuzco figured in 3-8 are all simply the different colored kernels 

 of a single very mixed race. ) 



Figs. 9-12. — Kernels of la (Hickory King 9 X Cuzco 759 $ ), showing xenia, the 

 dark plumbeous color of the male parent appearing in irregular blotches. 



Figs. 13 and 14. — Kernels of la (Hickory King 9 X Cuzco $), showing no 

 indication of xenia. 



Figs. 15 and 16. — Two kernels of first generation hybrid No. 5 from experiment la 

 (Hickory King 9 X Cuzco 759 $ ). The general coral red or rufus color is limited 

 to the pericarp, as in the Cuzco kernel shown in fig. 6, while the dark blotches 

 shown in fig. 16 are caused by color in the aleurone layer of the endosperm, as in the 

 case of the kernel in fig. 9, showing xenia, which is a painting of the original kernel 

 from which hybrid No. 5 grew. 



Figs. 17 and 18. — Two kernels of first generation hybrid No. 23 from experiment 

 la (Hickory King 9 X Cuzco 759 $ ). The ferruginous or fuscous color here is in 

 the pericarp and is evidently derived from the male parent, being similar to that of 

 the Cuzco kernel shown in fig. 6. 



Figs. 19 and 20. — Kernels of Id (Hickory King 9 X Cuzco 759 $ ), showing xenia, 

 the plumbeous or heliotrope-purple color, which is limited to the aleurone layer, 

 coming from the male parent. 



Figs. 21 and 22. — Kernels of 10a (Hickory King 9 X Cuzco 759 J* ), showing xenia, 

 the heliotrope-purple color derived from the male parent being located in the aleurone 

 layer. (Compare cross section of one of these kernels, fig. 32.) 



Figs. 23, 24, and 25.— Kernels of 20a (Pedrick's Perfected Golden Beauty 9 X 

 Cuzco 7a (J ), showing xenia, the plumbeous or heliotrope- purple color derived from 

 the male parent being located in the aleurone layer. ( Kernels of typical mother 

 parent used in this experiment are shown in figs. 26 and 27, and those of father 

 parent in figs. 3, 4, 5, and 6, as Cuzco 7a is simply seed from an inbred ear of the 

 typical Cuzco.) 



Figs. 26 and 27. — Kernels of typical Pedrick's Perfected Golden Beauty, which was 

 used as the mother parent in experiment 20a. (Compare figs. 23, 24, and 25.) 



Figs. 28 and 29. — Kernels of 41a (Leaming Yellow 9 X Cuzco 759 $ ), showing 

 xenia, the dark plumbeous color derived from the male parent being limited to the 

 aleurone layer. (Typical kernels of the mother parent are shown in figs. 30 and 31. ) 



Figs. 30 and 31. — Kernels of Leaming Yellow, which was used as the mother 

 parent in experiment 41a. (Compare figs. 28 and 29. ) 



Figs. 32. — Cross section of kernel of 10a (Hickory King 9 X Cuzco 759 $ ), show- 

 ing xenia, the heliotrope-purple color derived from the male parent being limited to 

 the aleurone layer: p. pericarp; t, testa; n, nucellus; a, aleurone layer of endosperm; 

 s, starchy endosperm. 



