BY THE SELECTION OF SOMATIC VARIATIONS. 79 



EXPLANATION OF FIGURES IN PLATES 1, 2, 3, AND 4. 



The paintings here reproduced were made by Miss Mary Eaton, artist of the New York 

 Botanical Garden. All figures are reduced to about three-fourths natural size. 



PLATE 1. 



FIG. 1. A typical leaf of the pattern yellow-red blotched taken from plant 1171613 on 



February 21, 1914. 



2. The pattern green-yellow-red blotched. Taken from plant 121 on April 15, 1912. 

 The yellow border is somewhat irregular and is not so fully developed as in 

 summer. 



4. Leaf classed as green-yellow spotted-red blotched. Painted on January 30, 1913. 



Shows rather few scattered yellow spots and a few rather large epidermal 

 blotches. 



5. Pattern green-red blotched from plant 131, taken April 15, 1912. Shows the com- 



plete loss of yellow as it occurred in the first bud variation observed and as it 

 frequently appears in plants having yellow. 

 5a. Young leaf of the pattern green-red blotched. 



6. The pattern yellow-green-red blotched. Taken from plant 1171 on November 2, 



1912. Shows the type which appeared on a plant with the pattern of figure 2 

 by a reversal of the relative positions of the green and yellow. 



7. A good example of the laciniate type of leaf. Taken on January 31, 1912, from 



a plant quite identical to plant 123153 shown in plate 4. 



8. The green-yellow-solid red type. Differs from figure 2 in having a solid red instead 



of a red blotched epidermis. Taken on January 4, 1913, from plant 32 and 

 shows the typical development of the yellow, which was very constant and 

 uniform on the plant during the winter. 



9. A typical leaf of the green-solid red type. This differs from figure 8 only in having 



no yellow in the subepidermal tissues and from figure 5 in possessing a solid 

 red epidermis. 



9a. A young leaf of the pattern green-solid red. The red completely covers the leaf 

 and is of the same intensity as in a mature leaf. 



10. This figure shows the upper surface of a leaf of the pattern green-yellow-solid red 



upper center. Figure 10a is of the under surface of the same leaf. The dis- 

 tribution of the green and yellow is as in figure 2. The red pigmentation is 

 almost entirely massed in the epidermis of the upper surface. There are a 

 few small areas of red in the lower epidermis. Painted on December 9, 1913. 



1 1 . The type yellow-green-solid red painted on October 26, 1914. This type developed 



from type of figure 8 by a reversal of the relative positions of the green and 

 yellow, a change which also gave figure 6 from figure 2. 



PLATE 2. 



FIG. 12. Type green-yellow, painted May 17, 1914. The pattern is slightly irregular in 

 this leaf, with a yellow segment extending to the midrib. This pattern was 

 derived from type of figure 2 by a loss of epidermal red. There are a few 

 streaks of red in the vascular tissues. 



13. The green pattern showing some epidermal red in the vascular tissues and a pale 

 and diffuse shade of yellow. Painted on June 5, 1914. 



13, a, b, c, d. Four successive leaves of a plant of the same line of descent as the plant 



of figure 13. Painted on February 2, 1915. The series shows an increase of 

 red in the subepidermal tissues as the leaf matures, with the maximum develop- 

 ment in figure d. Comparison with figure 13 shows the increase of red in a 

 line of descent by gradual fluctuation. The distribution of red indicates a 

 relation involving vascular tissues. 



14. Pattern yellow-green. This was derived from type 6 by a loss of epidermal red. 



The streaks of red are subepidermal. Painted on February 11, 1914, showing 

 the decreased development of yellow frequent in this type during winter. 

 14a. The typical summer condition of the type yellow-green. Painted on May 29, 

 1914. The yellow areas are bounded in marked degree by veins and there is a 

 much less development of green cells in the central area. 



