242 GOTE TURESSON 
lation given offsprings showing segregation as to branching habit, time 
of flowering, colour of leaves, shape of leaf margin, etc., but these 
families have been found to be in a decided minority. 
The pure cultures of biotypes of A. litorale comprised in 1921 
36 different kinds. About half of the number of the pure cultures 
comprised only 15—25 individuals in each family and have on this 
account been excluded from the table. The number of isolated bio- 
types could easily have 
been increased were it 
not for practical diffi- 
culties with regard to 
the space of ground 
needed and the care 
required for a greater 
number of isolations. 
The material at hand, 
however, is quite suf- 
ficient to make clear 
the marked hereditary 
differences between 
the different biotypes. 
In the 17 cultures of 
biotypes none is found 
to represent the com- 
bination of characters 
typical of another. 
Between some of them 
only small differences 
are seen, but these dif- 
ferences repeat them- 
selves with absolute 
exactness every year. 
Only one character is found to be less distinct in certain years, viz. 
Fig. 15. Atriplex litorale, field n:o 170. 
the time of flowering. In years when development is retarded and 
the flowering period is detained because of cold and rainy weather the 
flowering times of the different biotypes almost coincide, and differen- 
ces are hard to detect. Such was the case this summer, while in 1921 
as well as in 1920 the differences as to this character were beauti- 
fully seen. 
The variations as to branching habit, leaf character, bractlets, etc. 
