Varietäten, Descendenz, Hybriden. 71 



wa}^: there is no evidence, in most cases, that such races have ori 

 ginated as the result of a cross. 



The present paper is an account of the results obtained in ihe 

 course of raising three generations from Oenothera rubricalyx X 

 Oe. öiemiis and the reciprocals. 



Both gave the same result in F^, viz. intermediate as regard 

 habit and foliage though nearer Oe. rubricalyx. In these features 

 the later generations remained nearly uniform, 



The red bud character of Oe. rubricalyx however segregated 

 in a 15:1 ratio, indicating that two factors were responsible for the 

 red character. 



The difference between the large petals (40—45 mm) of Oe. 

 rubricalyx and the small petals of Oe. biennis (20 mm) behaved very 

 diflferently. In F2 and Fg individuals appeared having the modal 

 lengths of petals at all intervals between those of parents, and, in 

 addition, plants with petals as short as 12 mm. 



In many plants great Variation occurred in the size of different 

 flowers or different petals of the same flower. One part of a petal 

 may even be larger than another part, 



Cultures of Oe. Hookeri from the wild were found to exhibit 

 the same kind of size variations of the flowers. 



The explanation of this type of vegetative segegration is not 

 apparent but it obviously cannot depend on the reduction divisions 

 The occurrence of Mendelian behaviour in these hybrids as regards 

 the red or green bud character strengthens the Suggestion thai 

 different kinds of characters, i, e. those which are differently repre- 

 sented in the germinal material, will be inherited in different ways. 



Complete tables of breeding results are included and discussed 

 in the paper. VV. Neilson Jones. 



Ikeno, S., Studies on the hybrids of Capsicuin nnnuurn. Part 

 II. On some variegated races. (Journ. of Genetics, VI. p. 201 — 

 229. 1916.) 



General varieties of the above have been grown by the author, 

 among others one with large leaves and long hanging yellow fruits 

 recorded as 17B. In 1913 among nearly 100 of such plants, two 

 appeared with crinkled variegated leaves. The parts without chloro- 

 ph3^11 were white when young, becoming yellow when older. ' 



Plants were selfed and gave Fj variegated in varying degrees. 

 These plants were further selfed for several generations and the 

 following conclusions arrived at: 1. The more intense the Variation 

 of the parent plant the more numerous are the intensel}^ variegated 

 plants among the off"spring. 2. Fruits from green branches yield 

 fewer intensely variegated offspring than those from variegated 

 branches. 3, No entirely green plant has been obtained either from 

 plants with the least degree of variegation or from green branches 

 of variegated plants. The variegated plants have been crossed with 

 17B, the green race from which the variegated has arisen. Which 

 ever way the cross is made the offspring are always variegated. 



Thus there is no segregation of this character, although the 

 higher the degree of variegation possessed by the parent, the grea- 

 ter will be the number of intensel}'' variegated offspring. Experi- 

 ments with two other variegated races that have arisen in the 

 author's cultures confirm this result. Comparison is made with 

 variegation in other species and the hypothesis suggested by Baur 



