EXPERIMENT STATION REPORT. 231 



Add to the above, the green flesh and one has the condition 

 seen in several commercial sorts. As a rule, such fruits are of a 

 darker, duller jjurple due to the influence of the greenish tissue 

 l\'ing just below the color-bearing superficial layer. In such, 

 the sul)-calyx portion is less distinct than in the last group but, 

 as a rule, is more or less evident. .Many of the fruits in this 

 group show a very handsome mottling and striping due to the 

 unequal distribution of the green in the flesh, thus producing the 

 effect of a variegated green fruit covered with a uniform layer 

 of purple, not dense enough to obliterate the flesh markings. 



Another type of coloring mentioned at the outset, is a deep 

 (sometimes spoken of as "velvety") purple when fully de- 

 veloped, and is located in a thin layer just beneath a transparent 

 skin and in a large sense is a plant color appearing in the stem, 

 leaf, calyx, corolla, etc., and most pronounced wdiere the parts are 

 unshaded. This group of fruits may be divided into : ( i ) those 

 sorts that have a white flesh and therefore the sub-calyx portion 

 is beautifully white in striking contrast with the purple of the 

 exposed surface. Such fruits often show attractive bands of 

 alternating greater and less coloring just below the margin of 

 the calyx due in part to the unequal receding of this cover or 

 rather the elongation of the fruit. (2) The second set of vari- 

 eties under this group has the flesh green and when this is uni- 

 form, the fruit is quite evenly of a darker ("velvety") purple 

 than in the first set, but if the green interior is strongly streaked 

 there may an indistinct mottling of even a strongly colored fruit. 

 These latter fruits show a clear green beneath the calyx in place 

 of the white of the first set. 



If the two kinds of superficial colorings follow the Mendelian 

 rule, it leads to many complications in breeding. That this is 

 the fact seems to be shown by the results. Thus there are fruits 

 that show a color apparently a combination of the two, with one 

 shade of purple under the calyx and another when exposed to 

 the direct sunHght. 



A further combination obtains wdien the "velvety" purple 

 color, common to all sun-lit parts of the plant, is associated with 

 the less purple kind that is apparently confined to the inner wall 

 of the fruit and is quite independent of the bright sunlight. 

 When this occurs with the white flesh, as in crosses of the "Jersey 

 Pink" with "Dwarf Purple." the color is very attractive and be- 

 neath the calyx the fruit purple ("pink") is alone, but upon the 

 other portions of the fruit, especially on the sunny side, the color 

 is dark and suggests the richest velvet. 



