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studied—ordinary green foliage, yellow foliage designated P34, 
yellow foliage designated P30 and yellow foliage designated P32. 
Ordinary green foliage varieties have green unripe pods, and 
several kinds of seed cotyledons which express when mature the 
characters—wrinkled green (factors 7, 7, G), wrinkled yellow 
(factors 7, [, G), smooth yellow (factors R, J, G), smooth green 
(factors R, z, G). 
P34 type has, at first, light green foliage with light yellowish- 
white stems. These characters can be distinguished without 
difficulty when the peas first appear above ground. As the 
plants mature, the foliage becomes more and more yellow. At 
the flowering stage the lower part of the plants are bright golden 
yellow, only the growing tips being light green. When first 
formed the pods are bright green, but these gradually turn light 
yellow. The ripe seeds of this type are smooth yellow (factors 
wie. (Gr) 
P30 type also has yellow foliage, but during the growth period 
it never attains the bright golden character of P34 type. Its 
leaves are much larger, and more chlorophyll is always present. 
When combined with two dwarfing characters—small number of 
internodes (factor ¢) and short internode length (factor Je)—the 
foliage remains dark green until the pods are midway mature. 
Only the stem is characteristically pale whitish-yellow. The 
pods, as in P34, are at first dark green, later changing to a light 
greenish-yellow. The ripe seeds of this type are wrinkled and of 
a peculiar yellow (factors 7, 7, g). The inheritance of cotyledon 
color and texture (wrinkled and smooth) in crosses between this 
type and various green foliage types is discussed in detail in 
“Inheritance Studies in Pisum, I,’’ and to a slight extent in 
“Studies” II and IV. Very peculiar results were obtained. 
P32 type has green foliage except in the flowering region. As 
a young plant it is entirely green foliaged. As the floral region 
develops, the leaf midribs, veins, main stem in this region only, 
flower peduncles and pedicles, calyx segments and other ordinarily 
green parts have a bright yellow or yellowish-orange color. 
When the pods first appear, they are bright orange yellow. Their 
immature seeds are green and as the seeds develop and the pods 
mature, the latter become first canary yellow, later greenish- 
yellow. The ripe seeds are smooth yellow (factors R, J, G). 
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