WHITE: INHERITANCE STUDIES ON CASTOR BEANS 521 
EXPLANATION OF PLATES XXIII-XXVIII 
PLATE XXIII is a microphotograph of a highly magnified portion of leaf 
epidermis of the mahogany type showing the red pigment pattern. 
PLATE XXIV illustrates the various stem colors. Fig. A is red blush and 
green bloom; Fig. B is green; Fig. C is red blush and green without bloom; Fig. D 
is mahogany red or dark red-purple with bloom; Fig. E is mahogany or dark red 
without bloom; Fig. F is rose or carmine red. 
PLATE XXV illustrates inheritance of seed dimension. A. The ovule or 
maternal parent is represented by 30 seeds, each seed representing a random selected 
sample from a single plant, showing the degree of variation in seed dimension within 
the variety. B. 30 seeds selected at random from a single plant of the maternal 
parent variety, showing the degree of variation in seed dimension on the same plant. 
C. 6 seeds representing 6 plants of the paternal parent. D. F; progeny. Each F, 
seed is a random selected sample from a single plant, illustrating the uniformity in 
seed dimension of the F; progeny. EE. Three F, families are shown, each separated 
by a white line. Each F2 segregate represented by a single random selected seed. 
PLATE XXVI illustrates inheritance of seed dimension and coarse and fine 
pattern. A. Maternal parent. B. Seed similar to paternal parent in size, seed 
coat pattern and in seed shape. C. F; progeny. Note the uniform appearance 
both as to size and pattern in the F; progeny. D. F2 progeny. Only one F2 family 
is represented. The coarse and fine pattern segregates are arranged in a separate 
series. 
PLaTE XXVII. A series of crosses illustrating inheritance of seed dimension, 
pattern and seed shape. The different crosses are separated by a white line. Each 
seed was selected at random and represents a single plant. Only part of the F, 
progeny of these families are shown, as the large-seeded segregates did not mature. 
In all these crosses excepting cross no. 4 (from the top), the maternal parent is 
placed on the left, the paternal on the right, and the F; generation between them in 
one row, while the row or rows below represent the Fz progeny. In cross no. 4, the 
group of 7 beans on the left is all that matured of an F2 progeny, the F2 parent and 
two grandparents of which are in the same row and arranged as mentioned above, 
the ovule parent on the left, etc. In some of the F2 populations, attempts to classify 
the beans as to shape have been made. 
PLATE XXVIII. A. Two leaf types. Varieties with the crinkled, notched type 
being much more ornamental than the other. B. Loose and compact forms of fruit- 
ing spikes. The compact form associated with certain other characteristics in a 
variety means greater productiveness. 
