Igor] DISTRIBUTION OF RED COLOR 337 
In wet sunny places the numbers expected and attained were 
as follows: stems 33-31; petioles 19-17; veins 8-12; leaves 
(mesophyll) 13-14. 
In sunny places the number of red stems is considerably 
larger than expected, and in wet shady places the number of 
red leaves is larger; otherwise the numbers expected and 
attained are about the same. Percentages might also be worked 
out for the number of specimens showing red on the stems, near 
the ground, at joints, etc. 
In addition to the 285 plants, records were taken for 234 
duplicates growing in the following situations: 129 in dry sunny 
places, 44 in dry shady places, 35 in wet shady places, 26 in wet 
sunny places. This accords with the main series except in the 
exchange of wet shady and wet sunny places. 
To determine if the red color present in the spring and sum- 
mer is a persistence of the early spring coloration, or a new 
feature, 109 plants were marked in the spring in different localities 
with copper tags. Plants were marked only when others of the 
Same species near by were red. These were examined in sum- 
mer and again in the fall, and changes recorded. One hundred 
plants were recorded the three times, although in some cases 
the marked specimen was lost and data were taken from neigh- 
boring plants of the same kind. In 54 cases red color was lost 
in some part; in 34 there was no appreciable change; in 28 red 
color was gained in some part; in 21 it was lost entirely. There 
was no attempt to tell how many plants without color in spring 
§ained it during the summer or fall. 
Of the 54 plants in which the red color was lost there were 
36 cases (66.6 per cent.) in the leaf (mesophyll), 13 (24 per 
cent.) in the petiole, 12 (22.2 per cent.) in the veins, and 11 
(20.3 per cent.) in the stem. Color was gained in 14 cases 
(50 per cent.) in the petiole, in 9 (32.2 per cent.) in the stem, 
in 6 (22.2 per cent.) in the veins; in 2 (7.1 per cent.) in the leaf 
(mesophyll). 
Therefore, red color cannot be simply a persistence of spring 
coloration, nor is it simply an addition in the fall, for of 28 cases 
