120 
S. IKENO : 
will simply compare the results of the crosses of three kinds of white by 
orange :— 
. 
F l 
Ft 
1. Orange x white-I 
Orange 
3 oranges : 1 white. (Cross I). 
2. „ „ II 
Magen + a 
9 magentas : 3 oranges : 4 whites. (Cross VI) 
3. „ „ „ III 
Orange 
9 oranges : 3 pseudo-whites : 4 whites 
Colours of Vegetative Organs and 
Floral Parts. 
In all varieties of Portulaca the colour of vegetative organs, as stems 
and leaves on the one hand, and that of floral parts, as petals, filaments, 
styles, stigmas on the other, are intimately correlated to each other. In 
white-I stems, leaves, and styles are green ; and petals, filaments, styles, and 
stigmas are white. In white-II stems and leaves are green, and whilst 
filaments, styles, stigmas, and petals are also white, petals have sometimes a 
few broad or narrow magenta stripes or spots, and there may be few magenta 
filaments mingled with white ones. In all coloured varieties stems and leaves 
are reddish green ; filaments and styles are red or magenta, and so are also 
stigmas, though less intensely than in the latter. Ovaries are green, because 
their wall contains chloroplasts, and in coloured varieties they are somewhat 
reddish, but so slightly as to easily escape the notice of casual observers. 
When a coloured flower is produced on a white plant ( bud-mutation ) the 
brauchtet bearing such a flower as well as leaves on it are more or less 
reddish, whilst other branchlets remain ,green. The pseudo-white race seems 
to deviate from this rule, because while leaves and stems are reddish, the 
corolla is white, but in reality the latter is not perfectly white, being tinged 
with magenta. 
From the facts above given we may conclude that the factor C either 
alone or in conjunction with JR (with or without JB) is able to give colour 
to stems, leaves, petals, filaments, styles and stigmas. In white-II JR and JB 
are unaccompanied by C, and consequently are able to give colour, neither to 
stems and leaves, nor to petals, filaments, styles and stigmas, but sometimes 
