FLOWER AND SEED COLOUR IN LUPINUS 301 


The colour of the flower changes with age in this lupine as well 
as in other species of the genus. The different types are, however, 
-very distinct, and no difficulty is met with in classifying the types. 
While in all coloured types coloration appears in the vegetative organs, 
as in the cotyledons, in the petioles, in the bracts and sepals, no such 
coloration is found in the white flowered types, where the enumerated 
parts are pure green. 
DETAILS OF THE TYPES. 
THE FLOWER COLOUR. 
The blue type (Pl. Il, fig. 1).. Standard blue, wings blue with 
the upper edge of the upper third bluish violet and with a bluish 
white lower part, strongly marked with deep blue coloured nerves. 
Also the lower edge of the lower part lighter. Keel white with blue 
nerves and with an intensive dark blue beak. The two upper sepals 
of the calyx quite blue, the two lateral, smaller ones also almost blue 
coloured, the median, strongly developed sepal green with the excep- 
tion of blue coloured tip and nerves. The membraneous bract with 
blue spots and striae concentrated in the margin of the leaf. This 
makes the unopened inflorescence quite blue. The colour of the axis 
of the inflorescence in the upper part strongly blue, disappearing 
downwards. The colour of the flower more intensive with age. 
The tinged blue type (Pl. II, fig. 5). Standard of flowers just 
opening almost white on the inside with only a faint tinge of blue; 
the outside, the tip and the flanks with a weak but distinct blue co- 
lour. The median and basal parts white. The upper edge of the 
wings white, the lower edge with a faint blue colour, disappearing 
from the place of union downwards. Keel white with no trace of 
colour (the beak of the keel of the blue type deep blue coloured). 
The yellow anthers visible through the keel. 
= The blue coloured parts become larger with age, and the colora- 
tion becomes more intensive. At last a violet tinge appears on the 
inside of the standard and on the upper and outer parts of the wings. 
However, the colour of the oldest flowers of this type is not anything 
like the colour of the youngest flowers of the blue type. The keel 
remains uncoloured. The colour of the bracts and sepals as in the 
blue type, the colour of the unopened inflorescence, consequently, blue. 
The colour of the axis of the inflorescence also blue. 
The violet type (Pl. II, fig. 2). Standard violet with blue nerves, 
