R. P. Gregory 121 



(4) Flakes. 

 The Fj's from crosses between the "Ivy-leaf" and coloured races 

 contain flakes (Plate XXXI, figs. 56—59) in addition to the self-colours. 



"Ivy-leaf" x "Crimson King" The Fi of this cross, and of that 

 between "Ivy-leaf" and "Orange King," is indistinguishable to the eye 

 from the Fi of the crosses between " Snowdrift " and the same coloured 

 races. 



In the F,, the self-coloured flowers on red stems constitute a series 

 of types similar to those of the F^ from ("Crimson King" x "Snowdrift"); 

 the same series is probably repeated in the flaked patterns, though 

 the distinction between the shades of red and magenta is much less 

 easily made in the flakes. The flaking may be coarse, the coloured 

 areas taking the form of wider or narrower radial stripes (Plate XXXI, 

 fig. 56), or very fine flakes may be present in addition to the coarser 

 ones (fig. 58). The flaking appears generally to be strongly marked in 

 plants with red stigmas (figs. 57, 59). 



As in many other cases, the distribution of green and red stigmas 

 among the magentas and reds clearly indicates the existence of partial 

 gametic coupling (see pp. 127, 128). 



All the ofispring with light stems have some amount of colour in 

 the bases of the leaves, as does the "Ivy-leaf" itself. The light- 

 stemmed class consists of pale-pinks, and whites flaked with pale 

 colour. The flaking in this class may be very sparse, and in that case 

 is inconspicuous as the colour is so faint, but it was observed in all the 

 plants except four. The F^ contains no " Sirdars." 



The numbers obtained were : 



Red stems Light stems 



Beference Self Pale WTiite, flaked White, no 



Number ooloor Flake pink pale pink flake seen 



61/10 1 „ , , , I 97 33 30 6 2 



Palmate leaves 



62/lof '^*"^'^'^^^' 1173 42 35 25 2 



Total, palmate 270 75 65 31 4 



61/10 \ I 24 10 2 



\ Ivy leaves s + 3 undetermined* 



62/10) I 40 16 12 3 



+ 11 undetermined* +5 undetermined* 



Total, Ivy leaves 64 26 14 3 



+ 14 undetermined* + 5 undetermined* 



Grand total 334 101 79 34 



* Owing to the poor development of the flowers. 



Joum. of Gen. i 



