226 GÔTE TURESSON 
with above. It is apparently the locality already mentioned by 
NEuman (1884) as densely populated by Centaurea dwarfs. The dwarf 
could not be seen to differ in any respect from the original Vellinge 
dwarf, but on cultivation a prostrate habit of growth was taken up. 
This plant was also divided in 1920, and fig. 8 represents one of the 
clonal individuals. This clone does not attain half the height attained 
in the Vellinge clone, and the tall, nearly erect form of the latter in- 
dividuals contrasts sharply with the prostrate, spreading growth of 
the Torekov clone. 
In the summer of 1919 the Torekov locality was visited once 
more and a larger col- 
lection of the dwarf 
was made, in order 
that the nature of 
the dwarf population 
-might be studied more 
closely. The collec- 
tion included 40 indi- 
viduals, the majority 
of which, or 35, are 
thriving well. The be- 
haviour of this popu- 
lation in culture has 
been found to be much 
the same as the Suc- 
cisa population, series 
no. 35. Fig. 9 repre- 
Fig. 6. Centaurea jacea f. humilis. Plant in sents four of the types 
eT making up the popu- 
lation. The extremes, 
the dwarf in the upper left corner with stems only 15 cm. long, and 
the ascending-erect plant in the lower right corner with stems 60 cm. 
long, are rare. The former type, shown in the photograph, is the 
only one present in the population, while there are four individuals 
attaining the height of the latter type. The intermediates, two of 
which are shown in the photograph (pag. 228), predominate. As 
to the position of the branches, individuals wholly prostrate are in 
the minority, while plants with procumbent and ascending branches 
predominate. None has been found to be quite erect. There are addi- 
tional differences between the plants in this series, involving the hairi- 
